Fuel Pumps

[88bronco]

I have no electricity to either fuel pump. Installed new relays, checked all fuses, checked crash switch under dash. Any ideas?

 

[necessaryevil]

see if u have power to the main fuel pump relay, you might have a bad fuseable link,

 

[adsm08]

Yeah, follow the power. Start that the pump relay and go either forward or backward until you find the last place with power.

 

[ChopTop84]

Fuel pump relay only stays on for about 1 to 2 seconds upon initially turning on the key. It turns back on once the computer sees a tach signal indicating the engine is turning over. Its a safety feature.

Check the main power feed going into the relay. Dont worry about the power wire coming out and going to the pump until you confirm the power coming in is good.

I found on one of my B2s, that there is a ground wire under the airbox, screwed to the fender panel, and the screw had stripped and caused all sorts of headaches with relays not working right.

 

[Shran]

You can ground out one of the pins on the diagnostic plug (red D shaped plug on passenger side under the hood) to make the fuel pumps run constantly.

Occasionally the inertia switches just go bad - try removing it from the system by connecting the two wires on its plug with a paperclip.

 

[88bronco]

Thanks guys, I'll try your suggestions.