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Thread: Battery Icon, “FUSE” over odometer, bolts needle at zero

  1. #1
    Registered User Aronis's Avatar
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    Battery Icon, “FUSE” over odometer, bolts needle at zero

    Car was running but today battery icon lit up with word “FUSE” over odometer and volt meter is pinned at left side.

    Any ideas?

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  2. #2
    Registered User Aronis's Avatar
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    Fuse for instrument cluster blew, and if I replace it it blows immediately. So must be a short somewhere.

    Hunting this weekend.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  3. #3
    Registered User Aronis's Avatar
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    Took dash panel off, and did not find any frayed wires.

    Found another link on Audiworld (and several helpful posters) and it may be the Alternator Regulator. Thus why my battery had a premature death?

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  4. #4
    Registered User hahnmgh63's Avatar
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    Not too fun to replace with the motor in the car but you can move a few things to get at it. Regulator is cheap but labor will be expensive unless you're doing it yourself...then just some skinned knuckles.
    2003 White RS6 2013 Midnight Blue S5
    2013 Daytona RS5 2x944 Turbo's 1974 911 w/'91 3.6ltr motor
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  5. #5
    Registered User hahnmgh63's Avatar
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    I just did a search for 077903803A and it seems like the price is way up here in the states, around $160. I bought mine in Germany a couple of years ago for about 40 Euro. I might have to try to bring 5 of them back next time, even if they've gone up a little in price. And the one I bought was a Bosch, but Huco makes them too and probably just as good.
    2003 White RS6 2013 Midnight Blue S5
    2013 Daytona RS5 2x944 Turbo's 1974 911 w/'91 3.6ltr motor
    Roy, WA

  6. #6
    Registered User Aronis's Avatar
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    I found one at ECS for $37. Bosch 0021545806. ECS says it is the correct part for RS6. I'm going to call my local dealer on Monday for a quote and the proper part number. My Alternator was replaced at 100,000 miles.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  7. #7
    Registered User Aronis's Avatar
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    And it actually looks like a pretty straight for ward job....

    http://www.rs6.com/showthread.php/19...or+replacement

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  8. #8
    Registered User Aronis's Avatar
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    I could not find the short after poking around under the dash. I left everything open until tonight.

    I drove it to work today, it runs fine.

    Before leaving I checked the battery voltage and it was 12 V. With car running it was 14 volts and I could not see any A/C voltage at the battery.

    Getting at the alternator to properly check out the voltage regulator is a problem.

    So tonight after driving home in the snow storm, I just put the drivers side panel back on, buttoned things up and SCREW IT. Drive it as is.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  9. #9
    Registered User Aronis's Avatar
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    Ok, I swapped out the Instrument Cluster with a second hand one. * I put a new fuse in fuse 15 and turned the car on. *The volt meter works, the word "fuse" was gone, and the lights on the transmission shifter work, but the other interior lights still do not light up. *I could not run the car due to the immobilizer, but it turned over.

    I put the original back in and of course that fuse blew immediately. *Now I am wondering if there is a short out side of the instrument cluster in one of those interior lights somewhere.

    I have the car 'on' with the old unit in and hope the thing will "Sync" and the car will run, otherwise I am SCREWED since the "key" symbol is blinking and I may need to tow the car to the dealer to get it reprogramed. *I was told I could just plug the old unit back in and the car would run, but maybe that was not correct. *DAM IT! *I'll know in 20 minutes or so.

    This blows.

    ​​​​​​​Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  10. #10
    Registered User Aronis's Avatar
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    Car is "immobilized." So much for getting info from "the internet" LOL.

    I'll contact my local mechanic and see if he can make a house call with his computer.

    What a PAIN in the ass.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  11. #11
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    Classic case of misunderstanding/miscommunication.
    The original question was about unplugging the cluster and plugging it back in. There was no mention of "trying to start the car with mismatched cluster" between those two.

    You likely have an error stored in ECU's EEPROM now. Which is a bitch to write to.
    One of the solutions is to re-flash with "immo off" flash file, then get this sorted later.
    Another option is adapting the used cluster with VCDS. Need to dig out PIN codes from both new and old one.

    EDIT:
    Actually.
    I have never seen a mismatched cluster trigger an ECU EEPROM error.
    Can try having the original cluster in the car, then disconnecting the battery for a couple of mins, then connecting it back. Should clear all faults and allow the car to start.
    YMMV, though. The fact that I haven't seen that, doesn't mean that such a thing doesn't exist. Didn't mess much with immo.
    Last edited by nubcake; March 21st, 2018 at 02:08.

  12. #12
    Registered User mdegracia's Avatar
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    See, this is what happens when you go new car shopping, the RS got jealous...lol!
    03 RS6 Daytona Grey - EFI Express - 01e - SRM K24 - Aquamist - 495whp/580ft-lbs

  13. #13
    Registered User Aronis's Avatar
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    Quote Originally Posted by nubcake View Post
    Classic case of misunderstanding/miscommunication.
    The original question was about unplugging the cluster and plugging it back in. There was no mention of "trying to start the car with mismatched cluster" between those two.

    You likely have an error stored in ECU's EEPROM now. Which is a bitch to write to.
    One of the solutions is to re-flash with "immo off" flash file, then get this sorted later.
    Another option is adapting the used cluster with VCDS. Need to dig out PIN codes from both new and old one.

    EDIT:
    Actually.
    I have never seen a mismatched cluster trigger an ECU EEPROM error.
    Can try having the original cluster in the car, then disconnecting the battery for a couple of mins, then connecting it back. Should clear all faults and allow the car to start.
    YMMV, though. The fact that I haven't seen that, doesn't mean that such a thing doesn't exist. Didn't mess much with immo.
    Thank you....

    I reset all the DTC's with VAG Com and the car is running again with the original instrument cluster back in.

    So....next.......


    I have to figure out where the other short is. I don't think that a mismatched instrument cluster would stop the interior lights from working.

    When I put my ohm meter on the wire going out to the interior lights I got a short to ground. This is not right, there should be some resistance noted due to the light bulbs (all in parallel of course) but not a short to ground. Am I correct on that?

    I don't dare get the new cluster coded and just have the fault show again after a few weeks. Remember, the dimming thing started with intermittent function then the battery was dead, replaced the battery, car ran fine, later the interior lights stopped working completely, and then a bit later I got that blown fuse 15.. So I cannot ignore that. Should be fun to check every wire going to every light.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  14. #14
    Registered User Aronis's Avatar
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    Quote Originally Posted by mdegracia View Post
    See, this is what happens when you go new car shopping, the RS got jealous...lol!
    When I am up at the dealer next time YOU'RE BUYING LUNCH! Syracuse. Just noticed now....LOL... Bring your RS, I wont take your instrument cluster.....

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

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    My idea is that it might be convenience module, which is conveniently located below waterline and is prone to water ingress & corrosion.
    Whether it's responsible for interior lighting - I'm not sure, but definitely sounds possible. All the issues with lock, radio etc - also hint at that.

  16. #16
    Registered User Aronis's Avatar
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    Quote Originally Posted by nubcake View Post
    My idea is that it might be convenience module, which is conveniently located below waterline and is prone to water ingress & corrosion.
    Whether it's responsible for interior lighting - I'm not sure, but definitely sounds possible. All the issues with lock, radio etc - also hint at that.
    Yes, possibly. I'll take a look at the bentley wire diagram for that info.

    Thank you,

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  17. #17
    Registered User ben916's Avatar
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    There are TWO RS6 instrument clusters f/s on Audizine...
    SOLD - 03 RS6 Avus (905355)
    Current - 03 Toyota Tacoma 4x4 double cab - the YETI, lifted, winched, snorkeled, lockered, skidded, geared

  18. #18
    Registered User Aronis's Avatar
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    Quote Originally Posted by ben916 View Post
    There are TWO RS6 instrument clusters f/s on Audizine...
    I got one already.
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

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