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2002 chevy trailblazer_ls
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14 Posts
Discussion Starter #1
My high beams quit working, but the flash to pass works. I think I have narrowed the problem down. I found the following broken wire coming from/to the BCM.

1578424740218.jpeg

Question is, does anybody have the pinout of the BCM (with connector descriptions)? I have searched the web, and have not found anything helpful or consistent.
 

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The way that appears when I expand the pic, looks just like an old style fuseable link when they sacrifice to protect a high Amps circuit overdraw.

IIRC... that green color goes go the Hi-Lo beam switch. GM tends to use and stay with the same color codes since the '60s, to date.

AutoZone has all those pinouts, isometric and schematics for most vehicles, and more every week or so.

They are printable and downloadable too.

Use the "Nighttime" setting to see them better......
 

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2002 chevy trailblazer_ls
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Discussion Starter #6
Solved! Thanks for all of the replies. It was the broken wire. High beams are now functioning properly.
 
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