(FUEL) 84/85 Fuel pump relay trick...
Joined: Dec 1999
Posts: 7,855
Likes: 517
From: Behind a workbench, repairing FC Electronics.
Originally Posted by samtuck
wacky, how exactly does the relay provide protection? I understand how a relay works but I’ve never heard of it being used as any sort of backup or fuse type component
I just unplugged my relay and installed the jumper to the plug, the dead relay is still hanging.
I just unplugged my relay and installed the jumper to the plug, the dead relay is still hanging.
If you bypass said relay, the fuel pump will continue to run, pumping fuel all over the place.
Originally Posted by Pele
If you wreck and are unconscious or trapped in the car and a fuel line breaks, the engine will stop. With the relay, the fuel pump will also stop, keeping fuel in the tank...
If you bypass said relay, the fuel pump will continue to run, pumping fuel all over the place.
If you bypass said relay, the fuel pump will continue to run, pumping fuel all over the place.
Lives on the Forum
Joined: Jun 2004
Posts: 11,359
Likes: 14
From: Grand Rapids Michigan
Yet another fine thread gone to hell... 
I agree that bypassing the relay will disable the ability for the pump to shut off when the engine stops, which might be a safety concern. But really, it wouldn't be all that hard to replace the relay with just about anything else, use the same input to trigger the relay, and keep the features intact...
I agree that bypassing the relay will disable the ability for the pump to shut off when the engine stops, which might be a safety concern. But really, it wouldn't be all that hard to replace the relay with just about anything else, use the same input to trigger the relay, and keep the features intact...
