1992 Pontiac Bonneville electrical

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DAVIDMOULTON99
  • MEMBER
  • 1 POST
1992 Pontiac Bonneville 6 cyl Front Wheel Drive Automatic

car starts but the headlights come on no other outside lights the security light stays on and the oil presure gage goes all the way up have changed altinator and new ecm if when running you use any power lights brake fan radio the car quits what could this be
Apr 1, 2009 at 6:06 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Hello, Did you do any basic testing? Battery has a full charge, cables/wires clean and tight on both ends? Even with a new alternator, I'd want to see alternator output. Any codes? Your obd1, you should be able to check codes yourself.

You need to make sure the theft system isn't causing a problem, according to forum rules, I can't tell you how to bypass.
Apr 3, 2009 at 7:01 AM
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