Electrical problem-Geo Prism


Old 02-27-05, 12:38 PM
Thread Starter
Join Date: Feb 2005
Posts: 3
Electrical problem-Geo Prism

When I turn on the headlights I lose all the back end lights; headlights off, all back lights work fine??? If it matters the car is a 1989 model. Thanks for any suggestions.
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Old 02-28-05, 06:04 PM
Join Date: Dec 2001
Location: nc
Posts: 616
Just want to claify something. Do the brake lights work when the headlights are on or is it just the tail lights that go out? If the brake lights still work fine, check the light switch. Do the rear turn signals work with the headlights on?
Old 03-05-05, 09:48 AM
Thread Starter
Join Date: Feb 2005
Posts: 3
All of the back lights work when the headlights are off, none of them work when the headlights are on. I would prefer a root canal to having to open up the column so I was hoping it would be something else.
Old 03-05-05, 10:00 AM
Join Date: Jun 2002
Location: Long Island, NY
Posts: 1,531
I would inspect the grounds at the light sockets in the rear. If memory serves me correct the ground lug (white/black stripe wire) holds the socket in place. It screws into plastic and becomes loose.

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