Quote:
Originally Posted by EndlessAzure
If you want to understand which wire does what, you can use a multimeter to probe for voltage among the different conditions for the rear brake light harness: 1. Tail Illumination Power, 2. Brake Light Power, 3. Sidemarker Power, 4. Ground
Then, make/buy a jumper and splice into the signal you are looking for.
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Well this is the thing, I don’t know which wire does what on the Valenti 4th brake light. Does the blue wire control the brake light or the running light, and does the red wire control either or?