I have a front and back fuel tank, thusfar I would toggle the switch and go from one to the other, but about a week ago I toggled the switch for the rear tank and nothing happened, in the past it would occasionally lag but eventually it would work, not anymore...I need to know if maybe the relay burned out and if so where is it located so i can replace it. could someone give me an idea or even better a wiring diagram.

Thanx
Uncle Mike

 

Hello Uncle Mike..

There's only one relay for the fuel pump/s control.. Fuel pump relay is out in the engine compartment fuse box, but if it were bad, both F/R pumps wouldn't run.. Most times the pump itself fails, or is in the process of.. Could be the tank selector too, but generally the pump fails.. When you cycle the key to ON (or bump the starter) the selected fuel pump should run with an audible hum.. What you might try, is have someone crank the starter as you 'bump' the tank bottom 'briskly' to see if the pump starts.. Alot of times you can jar the pump to life, but is also an indication that the pump is on it's last legs..