i got one of these today out of a used truck it only has 4 wires i know how to find out where they go but do i tap into the tail lights or the brake lights to get signals, i had to rig the lights years ago to get headlights tail lights and brake lights
The 4 wire switches require a seperate light on each corner of the truck for turn signals. They won't work with the brake lights. The switches that work with the brake lights have 7 wires.