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Alternator? Voltage regulator?

Tiny
MOMOF2RS
  • MEMBER
  • GMC YUKON
Headlights, interior and dash lights (not radio and climate control lights) pulse. Alternator test shows OK, so does battery test.
2004 GMC Yukon 77,000miles
Tuesday, September 25th, 2007 AT 8:43 PM

1 Reply

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check ground and check headlights switch+
scan your BCM or try to moniter data in and out the BCM
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Tuesday, September 25th, 2007 AT 9:30 PM

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