Bmw bad relay. the next morning it didnt start at all.
Bmw bad relay. The AC is blowin hot air only and the compressor won't kick on. Then a couple of weeks ago I noticed rough running Jul 23, 2012 · Relays do go bad, you can just swap the horn and fuel pump relay. OEM ones were all in the correct OHMs. It commands the electrical power supply going to the fuel pump, ensuring that the engine acquires the proper pressure and amount of fuel to run efficiently. By this time I had found out about the Bentley manual and was well on my way to becoming a much more savvy DIY'er. Feb 9, 2022 · A bad relay can also be the cause of AC blower motor failure in your BMW 3 Series. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. Later model E46's have the fuel pressure regulator built into the fuel filter. Battery. A bad DME is a possibility, but there are other more likely possibilities. DME issues-won't start, DME relay, moreAll times are GMT -5. Typical issue for the most part, everything works, I hear clicking and Feb 28, 2024 · Posts 5 My Cars 92 BMW 325i I did buy all brand new from BMW (Fuel pump relay & DME relay) From FCP Euro I bought Hella cam and crank Positioning sensors. Either that are there's a problem with your ignition key barrel. Nov 9, 2021 · A bad relay can also be the cause of horn failure on your BMW 4 Series. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm How to Diagnosis and Replace Bad Bmw Starter, 2011 BMW X5 35i BMW CLICKS BUT WILL NOT START NO CRANK NO START ISSUE SOLVED!! NO CRANK NO START AFTER STARTER REPLACED! May 9, 2023 · The VTT relay is located in the E-box as represented in the previously posted video RHS of the engine bay. Relay vs. Unlike the e30 relay, that one did not click over when first plugged in (good sign Jul 18, 2021 · 2008 bmw 550i, 153k miles I've replaced the starter, battery and key. Sep 30, 2024 · The fuel pump relay position varies depending on year. Nov 30, 2015 · Your problem is with the starter relay or ews relay or some damn relay. I picked up the relay at Carquest for $8. How to Test a Start Relay Video: • How To Test a Starter Relay with No Tools What is a Starter Relay? Dec 4, 2024 · How do I know if my high beam relay is bad? Headlight doors don’t open. 1 btw) after bridging the connections 30 to both 87 connections the ecu finally showed power at pin 37. Feb 27, 2024 · The BMW CAS Module is a central component of your vehicle, and you need to know when it's not working properly. See our tech article on glove box removing. So first I check the main relay : I turn this whole cluster upside down and try probing the biggest of the middle 3 wires ( I probed everyone with the key on or off ) nothing has power via my test light. Question is can it be the relay, or do I have problems with the CAS module? Nov 9, 2021 · What these are and what you can do about it, we explain in this article. Use a 9 volt battery to quickly check the operation of a relay! This little mechanic life hack help to quick confirm the primary side of the relay is ok. Dec 21, 2021 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Sep 12, 2023 · Looks like some circuit to run an accessory. About 6 weeks ago it went into limp mode with code 002A64 - Digital Motor Electronics DME Valvetronic software error, servomotor 2. First of all, you should find out where the horn relay is located in your particular model of 3 Series. Most of the time it starts up but sometimes it will not. There are 2 ways an FSR can fail: 1. Lin Dec 21, 2021 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. When there's a vital and hot spark when you crank your BMW car engine, but your vehicle doesn't start, examine the fuel because the problem may be a bad fuel pump. Does this mean the relay is bad or could the Jun 7, 2021 · That "Chatter" could be due to a bad relay, improper voltage or ground being received by the relay electromagnet to keep the contacts CLOSED and supply power to Terminal 15 (KL15), or by corroded pins/sockets at X11010. To check if the relay is getting an ignition switch signal, you need to check your car’s wiring Aug 6, 2010 · i couldnt find any information about the DME relay that matches my situation when i searched it. Relays are electronically-controlled switches. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. However, I can't seem to locate the relay box. I replaced the motor with a new genuine VDO unit and it ran fine. Starter motor. Jul 7, 2018 · I'm under the suspicion of my car access system being bad. Jun 18, 2011 · I don't know which relay you substituted, but the fuel pump relay and the horn relays are the same. My e92 328i shows a key icon when I insert the key in but when I press the brake and push to start absolutely nothing happens. Under the right side of the dashboard on the relay panel, remove the glove box. Idle or hard starting problems are most commonly caused by intake leaks and/or a sticky or defective Idle Control Valve (ICV). The purpose of this relay is to prevent the fuel pump from continuing to operate in the event of an accident. I'm soon going to do the relay/pump troubleshoot procedure but I got a surprise Nov 9, 2021 · A bad relay can also be the cause of horn failure on your BMW X5. 20 including tax and it is virtually the same part. Learn the symptoms of a bad headlight relay and answers to FAQs here. The fuel pump relay is ALWAYS engaged when the engine is running, the horn relay has probably been used 25 times in the life of the car. Blower is blowing like it should. Apr 22, 2011 · The second no-start situation was a bad fuel pump relay. They are listed in the Bad Headlight Relay Symptoms. I'm soon going to do the relay/pump troubleshoot procedure but I got a surprise Feb 7, 2013 · BMW relays usually have a diagram with pin numbers on the plastic relay cover. May 26, 2023 · What is DME relay? About the DME Relay The DME relay is actually two relays in one. I've pulled glove This could be a sign that your car’s starter relay – or starter solenoid – has gone bad. After battery went dead, car would crank but not start. May 12, 2018 · Hello and thanks in advance for any help! 2011 328I. no Jul 30, 2011 · Drove a block it stalled and now will not start. Despite that, like all mechanical and electronic parts, the control module could fail, resulting in multiple problems for BMW Aug 18, 2013 · My FSR finally gave in at 15y/140K, so I took the opportunity to take some photos for those who need to trouble-shooting HVAC Blower Motor and FSR circuit. Apr 19, 2014 · 2006 - 550i - N62TU - Overheats in heavy traffic - no coolant leaks - I believe the coolant fan is intermittent (possible bad relay) Coolant fan load relay location What I can tell from the Bentley manual, it is located right side trunk (fan cutoff relay - only applicable as of 3/2007) ** May 23, 2025 · Symptoms Of A Bad Main Relay The most common symptom of a bad main relay is that you won’t be able to start your car, and nothing may happen when you turn the key. When troubleshooting I gave the fuel pump a ground with a test light, sprayed brake cleaner in intake and the engine started. The fuel pump relay must have power on pin 86 (relay coil) from the main relay output (pin 87) and power on pin 30. Which in turn freaks out, and causes the issues of NO power to,windows, A/C, radio and the wipers come on. One other thing you may want to consider is the fuel filter. Apr 29, 2022 · Electrical relay switches in a vehicle play a vital role to make sure certain circuits and units do not get overloaded. Mar 17, 2023 · Does anybody know where the Dme or fuel ignition relay are located? I’ve looked everywhere I’ve watched so many videos with no success I have a 2007 bmw 750li Jul 5, 2017 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. They are listed in the Jul 17, 2016 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Below, I’ve highlighted a more detailed list of the signs of a bad or failing main relay to look for. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm DME issues-won't start, DME relay, moreAll times are GMT -5. How to Test a Start Relay Video: • How To Test a Starter Relay with No Tools What is a Starter Relay? Nov 20, 2024 · The BMW CAS (Car Access System) Module is a crucial component of the car’s security system. 0si. These include electronic glitches, potentially arising from defective fuses or wiring, fuel pump failures, and issues with the automatic headlights. . You can find the main relay in your vehicle’s fuse box, which is commonly found Jun 24, 2014 · Can someone tell me what the unloader relays do and are they connected with the ignition switch in some way? Jul 7, 2018 · I'm under the suspicion of my car access system being bad. So, you should know the signs of a bad cooling fan in order to detect one. Mar 29, 2022 · « Previous Thread Next Thread » CAS KL30G relay sleep delay, high battery drain Oct 24, 2011 · The main relay, if bad, would prevent the engine from running. The turn signals will alternate between blinking at the correct speed and flashing quickly, as if a bulb Oct 15, 2010 · If that relay was good, then maybe it was never getting the signal to close, but it could have also been a bad relay. A safety circuit ensures the relay can only be activated with the engine running and only shortly after switching the ignition lock to position 2 in order to build up pressure. Parts Replaced: Fuel pump Fuel relay In this video we explain how to test a relay with a multimeter in just one minute. If your starter cranks the car and it started with starting fluid, your battery is OK. The starting relay is a small electrical device located in the starting circuit of a large current motor. Upper right. Solenoid When you turn the key to start your car, you are activating the ignition switch. Aug 18, 2013 · My FSR finally gave in at 15y/140K, so I took the opportunity to take some photos for those who need to trouble-shooting HVAC Blower Motor and FSR circuit. Parts Replaced: Fuel pump Fuel relay Mar 13, 2015 · Got a bit of a shock today. Nov 25, 2020 · As stated earlier, it appears your K6300 DME Main Relay is NOT being activated at startup, either due to LACK of ground to the Relay Electromagnet coil via Red/Gray wire shown in DME Supply wiring diagram, OR due to bad relay. How much does it cost to fix BMW Adaptive headlight malfunction? The average cost for a Headlamp Control Module Replacement is between $841 and $890 but can vary from car to car. My new and pristine 325i sedan suddenly developed a no-start condition, almost has to be fuel delivery as it will fire a few times then go into steady cranking with no hint of firing. While troubleshooting,I discovered Fuses 11, 16,37,38,and 39 had no power. Dec 29, 2010 · I found that when relay switches start going bad, they can really be affected by cold temperatures so I decided to start by replacing the relay and to great relief found that was the problem. Every car has relays, but why? what do they do? and how can we check if a relay is bad? Understanding relays' purpose and operating principles is BMW E90 ECM DME ECU engine computer relay location and replacement E91 E92 E93 BMW 325i 328i 330i 335i 316d 318d 320d 325d 330d 335d 316i 318i 320i 323i 325x Jul 3, 2025 · mine is 2011 528i F10 with N52 engine. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Jan 6, 2025 · The starter relay is one of the most critical and often overlooked components in any vehicle ignition system. 2. Oct 30, 2022 · The fuel pump relay is a little more complicated than the average one. First of all, you should find out where the blower motor relay is located in your particular model of 3 Series. Unable to Start Your Vehicle Find out the crucial signs of a failing main relay that could leave you stranded—don't ignore these warning signals! May 22, 2025 · A bad main relay can cause problems like a no-start condition, unreliable vehicle ignition, an engine that won’t stay running, and an illuminated check engine light. The only way I can get dash lights and everything to come on is if I hold the start button for 10 seconds Feb 22, 2013 · Background: TRM S50 EWS delete stock tuning 413 red label DME I ran the car out of fuel to change the fuel pump. All lights stayed on (headlights, brake, dome lights), on with car off and automatic shifter wont move now and windshield wipers also stay on with car off?This relay is behind glove compartment passenger side. To test the relay you can remove it and use a DMM and a power supply. Double check your fuel pump relay location with the latest BMW repair information. How do you reset BMW headlights? Nov 20, 2024 · The BMW CAS (Car Access System) Module is a crucial component of the car’s security system. There are four main components in the starter system. If I sit there and continuously press the start stop button it'll eventually crank and start. The time now is 08:27 PM. Everything else was powered Feb 28, 2019 · Tags 328i 2012 drivetrain malfunction eccentric eccentric shaft f30 manual 6speed manual tranmission valvetronic valvetronic motor Jump to Latest 19K views 9 replies 6 participants last post by pony_trekker Feb 28, 2019 S shie Discussion starter 11 posts · Joined 2017 #1 ·Dec 19, 2018 (Edited) Hi, May 22, 2025 · When headlight relays go bad, the headlights won’t work properly. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Aug 22, 2022 · A bad fuel pump, fuel injector, or a break in the fuel line can also make your BMW not start. New ones as well are good. This video covers headlights not turning on, flickering Aug 4, 2016 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Having a myriad of issues over the past year. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Sep 10, 2017 · Hello Bimmer people. Any problem with this electronic control unit will cause practical issues with your BMW. The information may be listed in your vehicle’s owners manual. Read on for six symptoms of a bad bmw car starter. Learn the common signs of a bad headlight relay so you can fix the issue before getting stranded at night. Feb 28, 2005 · Has anyone had experience with the load shedding relay going bad? Maybe this is causing the glowing bulb monitor problem as well, since the problems are showing up at the same time, after the work was performed. Oct 12, 2024 · Struggling with your BMW's starter relay? Explore tips for diagnosing issues, inspecting batteries, and repairing or replacing faulty components. Last edited by Aussie528iT; 09-01-2020 at 08:39 PM. In this case, for the fuel pump relay to work, it needs to get power from the ECM and a signal from the ignition switch. Apr 27, 2012 · I have an 88 325is and i have a no spark no fuel problem, after looking into several diagnostics i have come to the conclusion that it has to be because the ecu isnt getting the power input from the main relay at pin 37 of the ecu (motronic 1. So I've narrowed it down for you. I've narrowed down a no-start issue to being the fuel pump relay. Detecting these symptoms early will Dec 30, 2022 · Learn what the BMW DME does for your engine, what symptoms might indicate a problem with the system, and where to go when you need professional BMW service. Nov 16, 2019 · I popped open the relay thinking maybe it just needed to be cleaned but it looks pristine, and it also doesn't look like the pictures of r75/5 relays I can find online. Here you will find fuse box diagrams of BMW 5-Series 2011, 2012, 2013, 2014, 2015, 2016, 2017 (518d, 520i, 520d, 523i, 525d, 528i, 530i, 530d, 535i, 535d, 550i), get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay. A BMW DME (Digital Motor Electronics) plays an important role in determining engine performance and other operations. Work your way through what is below. First of all, you should find out where the horn relay is located in your particular model of 4 Series. I want to replace the fan relay, but where is it located? what is the OEM part number? (some people say it doesn't Apr 14, 2012 · Does anybody know what might cause the AC compressor to not engage. In 10% of the cases, the HVAC panel fails. Thanks guys. Not working at all How To Diagnose A Bad Cooling Fan Relay In Your BMW by Tolleson Mechanic Ultimate European Repair 11 subscribers Subscribe Bimmerforums is the preferred online BMW Forum and community for BMW owners. One relay controls the car’s DME [computer] and the other controls the fuel pump. Starter relay 4. Not working at all Aug 22, 2022 · A bad fuel pump, fuel injector, or a break in the fuel line can also make your BMW not start. Jul 5, 2016 · Ok for some reason the 30g relay is being activated all the time, and gets really hot. Of the above, only the fuel pump power is fused. Oct 1, 2023 · I've got a 2009 E70 with the 4. checked the DME rellay and it was working fine. lets get down to brass tacks; here are the facts: one day my car took 3 or 4 seconds to turn over. What codes? EWS sync problem typical 113027 Permanent Ignition relay and injectors, supply voltage, fuel injection: Line disconnection 12 42V 1B5302 ? Permanent Supply, terminal 15N_2: Short circuit to ground 1B5402 Permanent Supply, terminal 15N_3: Short circuit to ground 1F4A10 Permanent Relay, ignition and injection systems, activation: Line Apr 25, 2017 · Fuel pump relay The control unit can only monitor activation of the relay but not of the pump itself. Like most of the switches in your vehicle, the ignition switch controls only a low-powered signal, in this case to start the engine. Starter switch, 3. Oct 20, 2008 · How likely is it that the hazard/flasher relay in my 2000 R1100RT (100k miles) is the cause of my turn signal bahavior? (I am assuming the hazard relay controls the turns signals as well). BMW 1 Series – (photo by BMW) Some of the common causes that stops the horn from working normally on your BMW 1 Series are blown fuse, bad relay, faulty horn, corroded or worn out connector, broken wire, broken clock spring or bad horn button. Larrick has this same problem but he's taking his own sweet time to fix it (6 months, find his thread) so you can beat him to it and finally put this damn thing to rest. Despite that, like all mechanical and electronic parts, the control module could fail, resulting in multiple problems for BMW Apr 29, 2024 · In wrapping up, the BMW X3 xDrive35i, while a performance-oriented, luxurious and popular BMW model, has its share of commonly reported problems. Your on the right track. Thankfully, there are fault codes to help you understand and address any problems that occur. Jul 18, 2009 · injectors is controlled by the main relay. They connect or break paths in a circuit to control electric currents and their respective devices. the only sound it makes is a slight humming sound. I had the freon checked today and its full. In 90% of the cases, the FSR fails. Any clue how I can verify that the relay is the problem? As I'm on the road I may have to just circumvent the relay for now but I'd prefer to fix it properly right away. Intermittent hesitation/bogging/lean mixture codes led me to suspect a bad pump. Without both, the electrical circuit isn’t closed, and the relay isn’t letting current through. It can also result in a stalling engine while driving, or warning lights on your dashboard. First of all, you should find out where the horn relay is located in your particular model of X5. Common BMW DME failure symptoms are stalling engine, low engine performance, more emissions, check-engine lights coming on, and the car failing to start. Any advise is appreciated. What codes? EWS sync problem typical 113027 Permanent Ignition relay and injectors, supply voltage, fuel injection: Line disconnection 12 42V 1B5302 ? Permanent Supply, terminal 15N_2: Short circuit to ground 1B5402 Permanent Supply, terminal 15N_3: Short circuit to ground 1F4A10 Permanent Relay, ignition and injection systems, activation: Line Sep 29, 2011 · the salmon relay is a, well a relay, that is salmon colored, and it controls or gives power to the SMG pump so it primes, and all that good stuff, its located in the fuse box on the driver side. A horn relay is rectangular or square shaped with 3 or more legs at the bottom. Cooling fan works, BUT, big "BUT", it's high speed won't come on until coolant temp reaches well over 118 Celsius or about 245 Fahrenheit. Jan 9, 2022 · A) DME Main Relay is OK; B) Power Supply to X13020 (Large Red B+ Cable from battery connecting to R-side of JB fuse panel) is intact; C) You don't say you tried this, but with DME Relay activated by ground jumper, or whatever got Relay to click and provide power to F37, F38 & F39, you should NOW get ignition/ engine firing, when cranking Starter. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Symptoms of a starter relay gone bad and how to tell If it has failed. Codes thrown were 2ACC and 2ACB. So if the there's power at pin 87, but not at the pump You've turned the key and your car doesn't start - must be the battery, right? It might be the starter. 🔔 Tools used in video: Multimeter: https://amzn. Feb 9, 2022 · BMW Z4 – (Gabriel Nica / Shutterstock) The most common causes for AC fan blower motor not working in BMW Z4 are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. The DME will ground pin 85 to turn on the relay and power the pump (s) via pin 87. Mar 13, 2015 · Got a bit of a shock today. So after much searching I found to check for a bad fuel or main relay. the next morning it didnt start at all. Im new here and new to all BMW models. Each can be tested easily. Oct 17, 2025 · A BMW will not start for several reasons, such as a dead or low battery, a faulty starter motor, a malfunctioning ignition switch, fuel system issues, engine Sep 29, 2011 · the salmon relay is a, well a relay, that is salmon colored, and it controls or gives power to the SMG pump so it primes, and all that good stuff, its located in the fuse box on the driver side. The only reliable method of locating intake leaks is to have a smoke test run on the intake BMW E90 ECM DME ECU engine computer relay location and replacement E91 E92 E93 BMW 325i 328i 330i 335i 316d 318d 320d 325d 330d 335d 316i 318i 320i 323i 325x Apr 14, 2012 · Does anybody know what might cause the AC compressor to not engage. BMW in their wisdom don't always follow the standard pin arrangements for relays though, so you can't always use a generic relay. Bought my daughter a used single owner 07 x3 3. #1. Here is the black BMW 2008 328i relay we jumped with small jumper wire, then car was possed after plugging relay back in. Fuel pump will not have constant power applied to it. Headlight doors operate erratically and open or close on their own. The filter assembly or the vaccum line going Jul 17, 2016 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. to/3PPZNzP Insulated Glo Nov 9, 2021 · A bad relay can also be the cause of horn failure on your BMW 3 Series. Apr 8, 2006 · BMW motorcycle electric starter trouble shooting hints by Duane Ausherman This page is about the BMW motorcycle models R50/5, R60/5, R75/5, R50/6, R60/6, R75/6, R90/6, R90S, R60/7, R75/7, R80/7, R100/7, R100S, R100RS. So, how can you tell issues in your BMW car result from a failed DME? What are BMW DME failure symptoms? Detecting a problem caused by a failed DME is easy if you see the following symptoms with your car; low engine performance, misfiring or stalling of the engine, the car failing to start, check-engine lights coming on, and more emissions. A faulty cooling fan can cause many problems in your BMW. Oct 1, 2024 · BMW’s Fuel Pump Control Module, also termed EKPS, is a critical component in BMW’s fuel delivery system. This blog will show you how to tell if a relay is bad in a car, truck, or SUV. The only reliable method of locating intake leaks is to have a smoke test run on the intake Explaining How relays work and How to test them. A failure of this module can result in various symptoms, such as the key fob not working, engine start problems, central locking issues, and warning lights on the dashboard. 8 N62 engine. Headlight doors stuck open. See the list below for relay locations. 1. There is a couple of relays in the E-box for the VTT and the DME and I understand they have the same specifications and are interchangeable. uouda3sghawefoeutrhywhnmvcpjqc3x9arm2tmcv9l5fx