Funky electrical issue with right rear light. - JeepForum.com
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Unread 01-20-2014, 01:57 AM   #1
theflyer007
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1991 YJ Wrangler 
 
Join Date: Nov 2013
Location: Incline Village, NV
Posts: 9
Funky electrical issue with right rear light.

I know I can search but it is late and I'm still puzzled on this issue. Background 91 Yj past couple weeks right rear light would be on when lights where on, but would dim when the brakes where applied. Now the light does not come on when the lights are on, but both reverse lights blink when you use the turn signal to the right. The light bulbs are fine, and I would think it had ground as it lights up. Thanks guys and gals

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Unread 01-20-2014, 05:26 AM   #2
Mark05059
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1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: quechee Vermont
Posts: 4,381
no its backfeeding using the reverse light as a ground.. take the light off, clean the mounting studs and the tub around it and reinstall. See if your light works correctly afterwards
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Unread 01-20-2014, 09:07 AM   #3
Jeepsr4me
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Join Date: Dec 2004
Posts: 5,174
also make sure the right bulb in there. There is a single prong and a double.
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Unread 01-20-2014, 11:44 AM   #4
theflyer007
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1991 YJ Wrangler 
 
Join Date: Nov 2013
Location: Incline Village, NV
Posts: 9
Yeah I ve cleaned the housing and it appears the bolts have a plastic washer on them. Should I make a new ground wire? Could it be the switch on the steering column?
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Unread 01-20-2014, 12:12 PM   #5
GrEmLiN
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1987 YJ Wrangler 
 
Join Date: Feb 2008
Location: Southwest, Connecticut
Posts: 128
The problem is related to a bad ground or back feeding. Something is wrong with the wiring at the back of the Jeep. Clean connections, make good grounds, make sure all bulbs are OK and working - if one is burnt out it could freak out. If a ground went bad or a power wire is shorting to a ground it can cause backfeeding of this kind. If you know any mechanics with a Power Probe tool, go see them, they can make quick work of it. Or a cheap test light and a few beers until you find it.

Funny, I had a problem with my backup lights not being bright enough and my taillights / turnsignal interrupting one another for no apparent reason and out of the blue - turned out to be a bad ground on the reverse lights. Adding a ground wire for each light made everything work beautifully.

It sounds like a short because the currents are cancelling one another out. Idk. Have at it.
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Unread 01-20-2014, 01:36 PM   #6
theflyer007
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1991 YJ Wrangler 
 
Join Date: Nov 2013
Location: Incline Village, NV
Posts: 9
Thanks will try
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