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Harleyelf
Posted on Sunday, July 15, 2018 - 12:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

A week ago my taillight failed. Not a burnt out bulb, somehow everything in one bulb shorted straight to ground and blew out the fuse. Since that night, my instrument fuse keeps blowing, my tachometer doesn't work, and I've lost the idiot light cluster.

I pulled the wires from the tach, thinking it might have been fried, but the fuse still blows and the idiot lights still don't work.

What else is on this circuit on a '99 S3? What can I bypass to restore my neutral lamp and oil pressure warning?
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No_sprk
Posted on Sunday, July 15, 2018 - 12:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

i think the whole rear lighting harness has a connector. if it does id undo it. reinstall fuse and see if it still blows it
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Harleyelf
Posted on Sunday, July 15, 2018 - 02:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The lights work again, it's the accessory fuse that blows. Far as I can tell, it only lights up the idiot lamps and the tachometer.
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No_sprk
Posted on Sunday, July 15, 2018 - 02:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

well i know on my 96 s1 if you put the key in accessory position it will light up the speedo only. turn full ign and both tach and speedo light up
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Akbuell
Posted on Sunday, July 15, 2018 - 02:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

FWIW, re a brother from a different mother . .

Had a situation with my X-1 where the instruments would get wonky and/or die. A fuse might blow, might not. While trying to find the issue, I noticed that the branch of the wiring harness that feeds the turn signal flasher and the rear brake switch was routed across the top of the oil tank in such a way that it had a sharp, almost 90deg bend in it.


Rerouted the branch to remove the sharp bend and the problem went away. May be something to look for while troubleshooting.


Hope this helps, Dave
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Harleyelf
Posted on Tuesday, July 17, 2018 - 11:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Actually, it's the instrument fuse. Thanks, Dave, I will check that cable out.
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Natexlh1000
Posted on Tuesday, July 17, 2018 - 11:42 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check for mouse sabotage too!
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