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Thread: H4 Headlight Wiring Question
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03-16-2010 #1
H4 Headlight Wiring Question
I have a set of H4 headlights in my car. I had a local shop wire the relay wiring kit up a few years back. Problem is the low beams never did work and I didn't take it back to the shop (don't ask long story).
So as a quick fix I just swapped the wire from the high beam relay to the low beam relay and just drove around with low beams for the last couple years.
Now I am at a point where I would like to get the darn things working. I have done some minor troubleshooting (with my n00b electrical skills) and it appears the low beam relay isn't getting 12v at the wire that should activate the relay to release the power to the low beam wire.
Couple questions...
1)
On these wiring relay kits (i am going to have to trace back the wires and dig) how do they actually work?
2)
Is there a plug and/or a couple wires coming out around the driver side of the fenderwell/radiator support area that plug into the relay wiring?
3)
Does low beam and high beam each have their 12v lead respectively and this is how the lights know to switch from low to high?
4)
Where are these wires accessible in the engine compartment?
5)
There is a few wires that go into what looks to be an electrical board with a few resistors on them. What the heck is this?
I have wiring diagrams for the Camaro and have attached it to this post. It looks like 16T and 16LG are the High/Low leads. I guess I am trying to avoid buying a new wiring relay harness if I don't need to. Any thoughts, suggestions, help would be great.
Brian
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03-16-2010 #2Registered User
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