Switch Fuel Pump Relay Wiring Diagram

The white wire from the pressure switch goes to an ignition source in the fuse box.

Switch fuel pump relay wiring diagram. How to re wire a fuel pump off a relay. So use a larger gauge wire for lower voltage drop. I am a non wiring person i have a bosch relay 0 332 209 150 896. 1994 fuel pump circuit tests gm 4 3l 5 0l 5 7l.

It states 86 goes to ground. Fuel pump relay diagnostic troubleshooting notes. Fuel pump relay wiring diagram. The wiring diagram illustrations in this article cover only.

1992 1993 gasoline 4 9l 5 0l and 5 8l f150 f250 and f350 with dual single gasoline tank. Variety of electric fuel pump relay wiring diagram. One wire goes to the pump one to the start circuit and the other to the ignition circuit. Finally the purple wire from the relay to the orange wire on the pressure switch back to the pump.

A wiring diagram is a simplified standard photographic depiction of an electrical circuit. The wiring diagram illustrations in this article cover only. Nov 9 2008 13. The switch will also let the pump run when you hit the starter because the engine doesn t have oil pressure yet.

The destructions say attach the 18 ga yellow wire to an ignition switched 12 volt source or independant fuel pump switch which is fused. So when there is no oil pressure the switch connects start to pump and as soon as you start cranking it runs the pump. Should have 10 to 12 volts dc with key on engine off koeo or key on engine running koer. The diagrams and photos show how to wire up the fuel pump and oil pressure switch to a commonly available industry standard iso type 1 form c single pole double throw spdt relay.

1993 4 3l 5 0l and 5 7l gmc chevrolet pickups with the 4l60 e automatic transmission for the 1994 fuel pump wiring diagram check out the following article. A relay allows you to run thin guage wire from your switch to the relay so when you switch your switch it turns the relay one and allows current to pass through from your battery to your fuel pump. It shows the elements of the circuit as streamlined shapes and the power as well as signal links in between the gadgets. Fuel pump wiring for the red circuit is generally going to carry a much higher current than the relay.

Fuel pump relay wiring diagram automatic transmission only note. The diagram is color coded per circuit and only a few things may need to be said.