Headlight relay harness adapter (1 Viewer)

Joined
Jun 8, 2007
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1,292
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Houston
Trying to figure this out but it's kind of weird due to Toyota reverse ground thing. I purchased a 9005/9006 adapter relay harness which grabs the signals from one side of the headlight harness and goes through the relays with additional power and the outputs to H4 plugs.

I have tried a few pinouts that I could find mentioned in the forums but no dice so far. Do I need to wire the relay grounds back into the OEM harness so the headlight switch will function properly? Have tried most of the Toyota diagrams that go over this subject but somehow it's still not working properly. (That and the diagrams show the relay grounds going to chassis.)

Problem is: when everything is plugged in my high beams don't function, no indicator on the dash either. This goes for constant on mode and flash. My low beans work fine.
 
Joined
Sep 17, 2003
Messages
3,977
Location
Sunnyvale, CA
The 80 already has relays for the low/high beams. There really is no point adding another level of 'stuff' on top of something that already works very well. Plenty of threads and recent posts confirming that the stock system works as well (or better) than adding in more 'stuff'.

cheers,
george.
 
Joined
Jun 8, 2007
Messages
1,292
Location
Houston
Figures, will toss it in the box of useless stuff until a use presents itself later on.
 

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