I'm looking to change out the fuel lines on my fuel tank. Do I need to disconnect the battery when I do this since the fuel tank sending wires are right there? Are these just grounding wires or is there a hot wire also that could cause an explosion if gas from the removed line gets on them?
Ayuh,...... It's no argument that disconnectin' the battery is the safest thing to do, before fixin' anything, on anything with a battery,......
But,.......
Of the 3 wires you should be seein', 2 are Grounds,....... Usually a heavier green or black or yellow is used for the
bonding system, which electrically combines all of the metal bits in the fuel system, like the fill port, fuel tank, etc.......
It's bonded to the motor's block, which in turn is of course wired to the battery's (-) negative,.....
On the fuel level sendin' unit there'll be 2 wires,......
I think pink is commonly used for the gauge's sender wire, 'n of course, the sender's body will have a black wire to ground,....
As far as any 12v power at the tank, if the keyswitch is Off,........ Nope,.... No power to the tank's sender,.......