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Classics (Star Chief and 1957 to 1986) Converse about your Classic Bonneville.

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Old 09-02-2008, 10:05 PM   #1
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I have a 1985 pontiac bonneville..the problem that i'm having is electrical...my check engine light is on and I have no head lights I have no horn and I have no radio and when I push the horn the engine accelerates can someone give me some insight as to what is going on with this car thankyou in advance.
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Old 11-19-2008, 01:12 PM   #2
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Only thing I can suggest here is that, when one item (like the horn) affects some other item that should have nothing to do with it, no connection to it at all, then the problem is a broken common ground connection. Current that'* supposed to go through device A and then to ground is instead doubling back through device B, because both device A and device B have ground wires tied together at the same grounding point, but that ground point is broken or disconnected from the body.

If that grounding point is broken, the current on a hot circuit can double back through any other ground on a circuit that'* not hot, which can lead to some seriously weird results.

Get under the hood and check all your grounds, including the ground cable from battery to engine block, and ground straps between the engine and firewall or fender, to begin with. I think something'* gotten either disconnected or broken, but not on the supply side; the problem is on the ground side.
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Old 01-26-2009, 07:57 PM   #3
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thankyou for your comment...this one guy told me my problem is inside my steering colum...but i'll look into what you said also ty.
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