Re: GMC Headlight Relay Mod
I tested the green wires leading from the firewall and both carry the high beam current when the high beams are turned on. So I'm just going to run a relay for each of them rather than tie the wires in together.
The low beam relay went in without a hitch.
I've replaced the under dash, engine and headlight harnesses with new ones from AAW and they've been awesome. Perfect fit and not a single issue.
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