i'm building a race car out of a buick century and the tail lights wires got cut, come to find out the fuel pump ties into the talight wiring harness, i found the wires going to the fuel pump but i'm not sure what is what, there's 4 wires going to it, black, black with a white strip, gray, and pur any ideas what is what please so i can just run a switch to the fuel pump... thanks
Examine the wires at the fuel pump junction on top of the fuel tank. I'd bet one of the wires is the GREY wire. Another way you can determine which is which, get a Digital Volt Meter (DVM) and turn on the lights. Check to see which line has power. That's the line for the tail lights. Then have someone step on the brake pedal. Another wire should go hot (have voltage on the DVM). Slowly you will be able to figure out which wire does what. The left over wires (likely two) are for the fuel pump. Good luck. :)
Where is my ground wire located on my fuel pump on 86 buick century 2.5L got 3 wire the green wire in the middle in the hot wire help pleae
