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Discussion Starter #1
I have Roush boost gauge that I'd like to splice into the dimmer switch because I've read the gauge is very bright. Couldn't find a clear description anywhere of which wire to tap. Below is a picture of the dimmer wiring. Does anyone know which of the four wires is the correct one to splice into?



If not workable, which head light switch wire is the right one to tap?

 
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