2001 Bonneville SLE Headlight Problem - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-01-2011, 02:39 PM   #1
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Default 2001 Bonneville SLE Headlight Problem

So a couple days ago I notice I had a right front headlight out. I got a new bulb and replaced the old one and everything worked fine. The next night the same right headlight bulb blew out. I took the new bulb and the working old bulb and switched sides but neither bulb worked in the right side. When i went to put both bulbs back into their original sides I lost both sides. So now I didn't have any low beams, but the high beams still worked. I pulled open the engine fuse box and replaced the 2 headlight fuses that were both blown. I then tried it again and I now have no high beams or no low beams and the battery is now completely dead. Can anyone help?
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Old 01-01-2011, 02:40 PM   #2
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check over the headlight harnesses to make sure none of the wires have been chaffed and causing the power to go directly to ground that will blow your fuses for sure
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Old 01-01-2011, 02:43 PM   #3
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Where is that harness located? Or do you know where I can get a wiring diagram?
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Old 01-01-2011, 02:44 PM   #4
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the wiring harnesses are on the back of the headlights. let ne see if i can find the diagram in the FSM
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Old 01-01-2011, 02:45 PM   #5
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What about the wires going to the dimmer switch, because the wires right behind the headlights look fine.
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Old 01-01-2011, 02:50 PM   #6
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it'* possible that they may have gotten nicked somehow. also your headlight switch may have had a melted down. checking the FSM for diagrams now
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Old 01-01-2011, 02:54 PM   #7
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have you checked your relays by chance?

found the schmatics in the FSM about to scan them into the comp
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Old 01-01-2011, 02:56 PM   #8
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also if you cover the twilight sentinal on the dash they do not come on correct?
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Old 01-01-2011, 02:56 PM   #9
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not yet. I'm thinking its the headlights switch as well.
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Old 01-01-2011, 02:57 PM   #10
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ya they don't come on at all, not even with the car running or with just the key in it.
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