Use Replacement Headlight not working at the second power up

2001 CADILLAC STS
90,000 MILES • V8 • FWD • AUTOMATIC
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DAUNE
  • MEMBER
  • 1 POST
2001 Cadillac STS 90,000 mile had an front collision. I replace the Non-HID lights with used Non-HID lights all lights work during the first power up but on the second power up the low beam doesn't work. Any suggestions....
Dec 17, 2010 at 9:34 PM
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FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
Kind of a bizarre symptom for non-hid headlamps. The fact that it has had a frontal collision leaves open some variables. More than likely, it is a wiring type problem. On the second power up, the power and ground would have to be traced back through the circuit to the source, and determine where it is being lost. On halogen lamps, they just require 12 volts to operate, unlike a xenon(hid) which requires a ballast to charge and deliver 20k plus volts to ignite the bulb. If you are on the same key cycle, and switch the lamps from off back to on, do the lamps not light, and is it both low beams?
Jan 26, 2011 at 8:32 PM
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