Electrical problem

2002 CHEVROLET TRAILBLAZER
20,000 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC
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CHILIE WILLIE
  • MEMBER
  • 4 POSTS
When I turn on high beams it stalls and when low beams are on and I turn my left turn signal on the right light blinks with it, doesn’t happen on the other side. All relays are good as well as fuses.
Dec 2, 2019 at 3:12 AM
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AL514
  • ✓Experienced Mechanic
  • 5,617 POSTS
Hello, it sounds like the body control module may have gone bad, or you have a wiring issue. Is the check engine light on?
Dec 2, 2019 at 9:29 PM
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CHILIE WILLIE
  • MEMBER
  • 4 POSTS
No check engine light and no codes.
Dec 3, 2019 at 12:45 AM
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AL514
  • ✓Experienced Mechanic
  • 5,617 POSTS
Somethings going on with the body control module. It controls all the blinker circuits and is in communication with the engine computer. Unless there's a bunch of wires that have melted together. All the power and ground wires to the body control module need to be checked.
Dec 3, 2019 at 1:04 AM
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CHILIE WILLIE
  • MEMBER
  • 4 POSTS
Okay, I will start checking and let you know. might take a minute. I do have a BCM from my other Trailblazer can I swap them out?
Dec 3, 2019 at 1:19 AM
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CHILIE WILLIE
  • MEMBER
  • 4 POSTS
Can I use the BCM from another Trailblazer without having to reprogram it?
Dec 3, 2019 at 3:37 AM
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AL514
  • ✓Experienced Mechanic
  • 5,617 POSTS
You can try unless it's a wiring issue.
Dec 3, 2019 at 4:19 AM
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