Mine(90) has 4 wires though!
Yellow/black. Power to fuel pump
Black/ silver dot -- FP ground.
Yellow/ white- sending unit
BLACK/WHITE - Sending unit gnd.
* It makes sense that both FP and SU have separate grounds, given that both run at different voltages and current ratios[90_91).
As for the 88 there is a chance they share grounds.
**** Use a multi meter to validate each wires function.
Hope this helps.
Yellow/black. Power to fuel pump
Black/ silver dot -- FP ground.
Yellow/ white- sending unit
BLACK/WHITE - Sending unit gnd.
* It makes sense that both FP and SU have separate grounds, given that both run at different voltages and current ratios[90_91).
As for the 88 there is a chance they share grounds.
**** Use a multi meter to validate each wires function.
Hope this helps.
