Gm Fuel Pump Relay Wiring

Yellow from the relay to to the white wire on the pressure switch. Should have 10 to 12 volts dc with key on engine cranking or key on engine running koer. The fuel pressure test gauge recorded 0 psi this could mean that the fuel pump relay is not the problem behind the no start condition but to be sure i suggest going on to the next test step.

Typical Gm Fuel Pump Wiring Diagram For Trucks Automotive

Fuel Pump Relay Wiring Diagram 1994 Chevy Pickup 4 3l 5 0l 5 7l

Ford Fuel Pump Relay Wiring Diagram With Images Ford Ranger

Fuel Pump Relay Wiring Diagram With Images Relay Dodge Ram

The Pcm Activates The Asd Relay And The Fuel Pump Relay At The

Ford Fuel Pump Relay Wiring Diagram With Images Ford Relay

So now instead of the stock ecu energizing the fuel pump it will energize this relay.

Gm fuel pump relay wiring. Fuel pump relay diagnostic troubleshooting notes. For the 1993 fuel pump wiring diagram check out the following article. For the electric fuel pump application the relay actuating switch will be a common three prong oil pressure switch that screws into a 1 8 27 npt oil pressure port on the engine. Fp relay terminal a org wire.

1993 fuel pump circuit tests gm 4 3l 5 0l 5 7l. Oldskool funk 75 414 views. Wire pin 85 of the relay to the 12v supply wire from the stock ecu that you just cut. Easy how to test relays make home made wires jumper.

How to test fuel pump relay test duration. The white wire from the pressure switch goes to an ignition source in the fuse box. Wiring in the fuel pump relay. This 12v wire will now energize the relay to turn on.

Engine performance diagnostics chapter 3 page 26 symptoms. Making sure the fuel pump. They are usually labeled 30 85 86 and 87. Bypassing a relay using a single wire.

In this video i will show you how to troubleshoot this entire fuel pump electrical system including the fuel pump relay wiring and computer. The relay should have 4 pins on it. The destructions say attach the 18 ga yellow wire to an ignition switched 12 volt source or independant fuel pump switch which is fused. The fuel pressure test gauge recorded 56 62 psi after swapping the relay this test result confirms that the fuel pump relay is defective and needs to be replaced.