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Volkswagen Passat Fuse and Electrical Problems



  • I tried jiggling it and it still wouldn't work. I also tried plugging it in to the socket in trunk and that didn't work either. Could it be a fuse maybe?

    Thanks for your reply-
  • altair4altair4 Posts: 1,469
    Does it work in the front socket, in the ashtray? So far, we haven't been able to rule out that the thing is not making proper contact.
  • yes it works in the ashtray socket but not the rear socket?
  • Did you ever get an answer to the "My Passat won't start"? My son just had the same problem with a 2000 Passat wagon. Started and ran one minute, parked. Then door locks, interior overhead lights, windows and sunroof disabled, won't start, can't be jumped and battery is fine; headlights, dashboard lights, wipers, radio all fine. If dbrownlee or anyone else has an answer, send it around, please.
  • My problem exactly, but I have had no response. it has been sitting in my driveway for a week because I hate to tow it in with no idea what might be wrong.
  • I went back through earlier posts and found similar stories. The diagnoses seemed to be either a fried Fuel Control Module, located under the spare tire compartment, or a bad CCM (Comfort Control Module?) an apparently serious chunk of electronics (think $600+) found under the driver's side floorboard. Each are described as susceptible to moisture. In one case the fried Fuel Control Module was thought to have failed due to water in the spare tire well after a professional cleaning and detailing, and then caused the CCM to fail.
    I'm going to pass these thoughts along to the mechanic who has my son's Passat and will post the result when I know something.
  • Thanks, I appreciate anything you can find.
  • my EPC light just came on (its a power management program used by the computer )- it might be ignitor coils need to be replaced - there was a recall issued about two years ago to replace all ignitor coils in VWs b/c they had bad batch- if you havent had that done then likely that could be the problem. i am not sure if it the problem with mine i brought my 02 preowned

    i have EPC lite on now and eng lite just came on _ the car when idling will just shut off if i turn on AC and any otehr appliance.

    dealer wont give me an appt until nxt wed but i am gonna try to sneak in tomorrow .
  • I'll call tomorrow to see about the recall. At least you can get yours started to even go there! Keep us posted on your success, and thanks.
  • I know a little about the Fuel Control Module, I have had two of the them replaced.

    If it gets wet, it will short out. The first indication is that the fuel gauge goes to Zero and if you have a "Miles To Empty" indication it goes to --- indicating no input. If you don't do something quickly, it will cause the Comfort Control Module to fail. When it fails, nothing will work including car starting.

    The 1st time it happened, Miles to Empty went to --- and no indication on the fuel gauge. A day later, things began to fail, power windows, radio, Auto A/C, etc. The next day, car wouldn't start. When they opened the trunk they found the area where the module is located (under the spare beneath a foam block) filled with water. They sprayed water everywhere and could not find the leak so they blamed it on a body repair I had done on the Drivers Door (go figure!). When it happened again, I caught it before the Comfort Control Module failed. Again, water and again they blamed it on the old body repair (they couldn't explain how that could occur!) but they said they couldn't find the leak.

    I took the car home and looked to see where water could come in. There is a seal where the fuel signal from the fuel tank enters and goes to the fuel control module. If I sprayed water on the seal from the outside (like would happen from the spray from your tires in the rain!) water would begin to penetrate the seal and run down the wires to the module. I double bagged the fuel control in plastic bags, sealed them, and used a sealer around the seal penetration through the trunk and have not had a problem since. I do check periodically to see there has been any water far so good!
  • Which module is under the spare tire? Fuel module or Comfort control? does it take a tech to replace or does it just plug in?
  • The fuel control module is in the trunk under a foam block under the spare. The comfort control module is under the floor under the drivers feet.
  • Read my note #133 entitled "Fuel Control Module" dated Sept 25
  • Thank you. I read #133 and have been following your advice avidly. :)
    If I take the fuel control module out and take it to the dealer, can they test it?
    When you say the comfort control module is under the floorboard under the seat, does I access it from under the car, or by removing the seat? Can they test that also?
    Thanks again.
  • More bad news. I just went out to take out the fuel control module and found that I can not open the trunk either. Neither the key fob nor the interior button responds.
    All dashboard indicators, head lights are functional, but that's it. Can't even open the gas cover.
  • altair4altair4 Posts: 1,469
    You can open the trunk with the key. Hunker down in front of the rear license plate. On the upper right side of the plate, you should see a regular slot for the key.
  • The Comfort Control Module is in a protective box floorpan cavity under the drivers seat carpet. If you are going to do any repairs yourself, I recommend getting "eBahn® - Automotive Technical Repair Information" for your car. It is on Disk for about $100 and is the complete auto repair manual from VW.
  • I would think they could test it. If you get to it and it is wet, your "screwed". Again mine got wet twice. I solved the water problem but have still double bagged the module and sealed it.
  • 1995 passat VR6 Fuel pump not working but the float is...relay replaced and fuse but still nothing.
  • Quick follow up. Rechecking all fuses, I found one that was broken. It was to the vanity mirror. I never checked it because I couldn't make any connection between it and the car starting. I replaced it and it burnt immediately. in fifteen minutes , I found the wire to the light in the vanity mirror was broken and was shorting to the metal. Who needs a vanity mirror light? unplugged it, replaced the fuse and I am off and running. No tow charge, no expensive bill, no computer parts. Of course it took me four weeks,......... but thanks to all for your help.
  • Hi sorry guys this is my first time using this site, was just reading thru it as ive got a problem with my VW Passat, there seem to be good responses to peoples problems and great feedback, hope you will be able to help me.

    Basically the red lights on the side of the grills (from where hot and cold air comes in, which can be closed, opened, moved left right, every car has 4 of these on the dashboard)are faulty. the two on the passenger side (left) are fine and come on when the lights are turned on, but the 2 on the right dont come on (the lights i'm on about are the ones which are on one side of every air grill above and under the knob you turn to close or open the flaps).

    i have a feeling this is a problem with a fuse as only two are turned off and two are on (lights).

    i dont know where the fuses for these are. i had a similar problem with the sidelights before when the front and back sidelights on the left of the car only didnt come on, a car electrician checked some fuses on the right hand side of the dashboard- he opened the door and took off the end pannel to reveal the fuses, checked a few and replaced one of them and the lights were working fine.

    i have cxhecked all the fuses on that side but found non that are fused, could you please let me know what i should do or where to find any other set of fuses which may have gone.

    i would really appreciate it if someone could reply and let me know how to solve this problem. if i havent posted this problem in the right place could someone please forward this to the right department and let me know via e-mail where they have posted this note. i would be very grateful.

    i know i sound very stupid, but i am unfortunately a novice at this...thanx for your time guys.
  • altair4altair4 Posts: 1,469
    Cptn Jack - yours is not an uncommon problem. I'm going to disagree with you and guess that it's not a fuse, but rather the bulbs themselves. Part number is 3B0-919-243-B.

    You might find instructions for the replacement of those bulbs if you google dash vent light bulb replacement Passat.
  • I recently purchased a 99 passat, and the drivers window does not work, i have tried new switches, and 3 used window actuators, when i push the button i hear click from the electronic board on the window motor, but thats it. I have removed the electronic board, and put power direct to the motor, and it works? All other windows work any suggestions?
  • My 99 passat has the engine light come on, often, the oil light intermittent and the airbag light now permanantly on any ideas
  • Hey Their, I have a 2000 Passat that everything seems to work just fine except the dome lights...yes...14 is fine. The bulbs are good and Like I said all other stuff seems fine. Alarm does act a lil funny sometimes. Sometimes not responsive. Any ideas as to why I cant get the freaking dome lights to work? I have seen stuff about the CCM but why would everything else seem to work fine?
    I am in the dark with a black leather interior and I AM SCARED OF THE DARK :cry:
    Any Ideas Guys????
  • Hi, I am new to this kind of thing so please be patient with me!!
    I have an elderly VW Passat Estate (we call them estates in the UK). For no good reason my drivers door window will suddenly decide to open by itself. It will alos sometimes do it as I start the car up. Up to now the passenger window has been OK but it has suddenly started to open when I start the car. Also the rear windows won't open and the switch on the dashboard that stops the rear windows opening has no effect. I am beginning to assume that there is a control module somewhere that might be causing the trouble by sending signals to the window motors that it shouldn't be sending. I don't know but reading some of these messages on the site I think there is such a unit. If so, does anyone know where it is and is it easy to change? Thanks in advance.
  • altair4altair4 Posts: 1,469
    Yes, there is a comfort control module that may be the culprit. It's located in a well under the front passenger compartment floor in the 1998-2005 models (older years, I have no idea). The problem could be that water has infiltrated the well holding the module, causing it to behave badly. Can't recall if it's on the right or left side, so you'll need to explore this further.

    You might ask "why is water getting in my car?" Read all about it here:
  • Hello all. I just finished reading through this forum and didn't see anything quite like this.

    I bought my Passat in August, kinda cheap for the area and the car. A month later, the battery went dead. I got a jump start and got home okay, but the battery didn't hold the charge. I replaced the battery with a top of the line Bosch after having Pep Boys test the electrical system to make sure it wasn't the alternator.

    Two and a half months later, and I'm back at Pep Boys with a dead battery which won't hold a charge. They test everything again, tell me it was just a bad battery and replace it (free of charge since I got the extra warranty).

    Two weeks later, and the battery died on me again. I can't possibly think my luck with batteries is this bad. I'm relatively certain it isn't the alternator, since the second time my battery went dead I drove for 45 minutes off a jump start with no issue.

    Any thoughts?
  • ;) Hi all, soz for not replying back, as i said it was my first time, and got loadz of other stuff to sort out too. finally found my password and username. details were not in the computer so couldnt post a reply to the response i got.

    Thank you very much, i stand corrected, the problem was the bulbs, i opened the dash vents as shown
    in the pictures and it was exactly the same, i even managed to get the tricky part of pulling out the bulb, it took me 45mins but now i can take out the bulbs in a few seconds, cool...

    However the site said buy the bulbs online for about £3.89, excluding postage and packaging. but when i went to dealers to find out if i can get them quicker at probably the same price or a bit more, the dealers gave the bulbs for £3.08, buzzin. have changed the bulbs and love it, the lights are workin......

    Will be back if have any other problems, Again, ewant to thank the person who helped me and Wish you all the best, as this is the best site i have ever seen, rapid response, ive been recomending you lot left, right and centre. You da best guys, THANX THANX THANX THANX.............

    Reply if this gets to the right person, again dont know ow to get in touch with them directly but if you get this please pass it to the right persomn who helped me so they may let me know the received this... i really do want them to know how much i appreciate this help.

    Take care all, BYE and THANX again...
  • nishwnishw Posts: 3

    I had a variety of similar problems on my 2002 Passat, (no indicators but hazards worked, no wipers, no heater). Turned out to be the ignition switch, it cost £22. My dealer was brilliant, and seeing as they couldn't diagnose it after 2 hours, they did not charge me anymore diagnosis time.

    So check out the ignition switch. All the bad earth problems for random electrical componets seem to stem from the switch. Pass it on.

    Good luck.

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