Question about 2000 Pontiac Sunfire

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Alternator or BCM problem ? Gauges drop

OK here is the problem, I can start the car and it runs fine but when i turn on any thing that draws a lot of amps the gauges drop to 0 and i get P1626 and U1040, theft light comes on and check gauges comes on. I have hooked up a meter and took readings at the battery and they stay above 14.00 with lights or a/c and is 14.2 with nothing on. If i turn on the lights and a/c then hit brakes the readings go down below 13.3 and the car has died a few times when the reading keep dropping. I have a new battery , I think it might be an alternator problem or maybe BCM, but I want some other input. Oh i have noticed when gauges drop out if i give it gas they go back to normal. One other thing if I turn blinkers on the lights will dim with them and have noticed the ac/heat blower will drop out if other power acc. are on. Any help would be appreciated ....... 2000 sunfire with 2.2

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It is not the BCM, go to any Kragen or Autozone parts store, have them test the alt, the test is free

Posted on Feb 18, 2009

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