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Old 12-29-2010, 08:15 PM   #1 (permalink)
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Keep blowing fuse for back-up/reverse lights

I noticed the other day when I pushed the remote lock that the back-up lights did not light up. I checked the fuse (10A) and it was blown - I replaced it and tried it again - the backup light flashed for a second when I pushed "lock" and then the fuse was blown again. Has anyone else had an issue with this? I noticed this 2 days after I was playing around with a loose connection on the auto dimming rear view mirror - could there be any coincidence between the two? Thanks

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Old 12-30-2010, 06:31 AM   #2 (permalink)
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Does anyone know if there a reverse light switch on the transmission? Could this possibly be the problem?

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Old 12-30-2010, 09:34 AM   #3 (permalink)
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Not sure, but maybe a bad electrical harness or something? In regards to the fuse blowing, maybe you're shorting it for some reason. Have you switched the bulbs lately?

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Old 12-30-2010, 09:34 PM   #4 (permalink)
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okay i can tell you with some degree of confidence that if your blowing fuses that quick then yes you have a short., do not put a bigger fuse in, this will cause some nasty other problems.
you can check the wires with a meter goin backwards from the light receptacle to where they meet a harness somewhere check all places it connects with other harnesses.
at work we trip breakers and blow fuses from a loose plugs arcing.

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Old 12-31-2010, 04:53 PM   #5 (permalink)
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Don't ask me how I know this or why I had to buy a 25 gross pack of 10 amp fuses today when installing my HIDs (I swear, its the truth), but make sure you did not plug the harness in upside down in the tail light. Somehow, I manage to do that on one headlight. It actually fit upside down (so it was reversed). Turned a one hour job into three hour job.

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Old 12-31-2010, 11:48 PM   #6 (permalink)
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The light green wire inthe rear view mirror harness is connected to the backup lamp relay which is powered by the b/u lamp fuse 10amp. I would discinnect the rear view inside rear view mirror and see if you short goes away. Before you do that, try to inpect both side of that connnector to soo if maybe there's a frayed wire in that area that is maybe shorting out.

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Old 12-31-2010, 11:54 PM   #7 (permalink)
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As far as the reverse switch. The circuit that tells the powertrain control module that your in reverse position which then tells the body control module that it's in reverse, is not powered by ther back-up lamp fuse. Not your problem here.

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Old 01-01-2011, 07:53 AM   #8 (permalink)
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thanks a bunch diagger - I was thinking there had to be a connection - too much of a coincidence.

I will try disconnecting and see if it goes away - when you say to inspect the connector - are you talking about the rear view mirror connector - or a backup light connector?

thanks again

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Old 01-01-2011, 08:01 AM   #9 (permalink)
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The connector at the rear view mirror harness.

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