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2003 chevy trailblazer_lt_ext
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268 Posts
Discussion Starter · #1 ·
Why is there a wire harness running to and connected to the underside of the hood?, there isn't even a little light under there, could it just be a ground?
 

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2004 gmc
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26,181 Posts
If it's black, and connected to a ring lug, then yes, it's ground. Or you could be an early 2003 model with the 2002 harness in there that would support the underhood lamp, which they de-contented in 2003 to save a buck.
 

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2003 gmc envoy_slt
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357 Posts
You can track that ground wire from the base of the hood back to a larger harness nearby and then out of that harness to a vehicle firewall ground. The remainder of the wires in the harness go through a firewall grommet to inside the cabin.

C.B.
 
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