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1990 ford ranger fuel pump will not run

3 Aug, 2010 Auto Repair Questions, Ford

I have a 1990 ford ranger with a 2.3 liter. My fuel pump will not work.I replaced the pump,relay and the batteries ground cable.I have a wire that runs from the ground on battery to the fuel pump relay he is getting about 8 volts could you help me find the problem? thanks

Freeautomechanic on August 3rd, 2010 at 7:20 pm

Check the inertia switch (fuel cut off switch) This switch shuts off the fuel pump in the event of a collision. Once the switch has been tripped, it must be reset manually in order to start the engine.

The inertia switch is located on the toe-board, to the right of the transmission hump, in the passenger-side footwell.

But your relay should see battery voltage on the BLK/YEL wire that comes from a 30 amp fuse#1.
The RED wire that goes to the Relay should be Battery Negative.
The TAN?LT GRN wire going to the relay sends a battery negative to the ECM at pin #22
The ORG/LT BLU wire connects from ECM pin #8 to the relay and activates the relay to send battery voltage to the Fuel Pump on a ORG/LT BLU wire.

andy on January 15th, 2012 at 3:20 pm

my 2001 gmc yukon , my fuel pump stays on when i turn off my truck

andy on January 15th, 2012 at 4:09 pm

how do you reset your computer on a 2001 yukon 5.3

Robert Baker on January 21st, 2012 at 11:51 am

fuel cut off switch, does this switch act up like works and doesn’t work. i put in a new pump in my tank and a couple months later, i had to sit waited and my 96 ranger startered. after that it really startered acting up and i had to use starter fuild and the truck will run. now the fuel pump won’t turn on again. I am thinking cheap fuel pump and I may need to replace again, maybe got a bad pump. what should i check first before dropping the tank again please. It’s winter time here in wisconsin and I work outside.. thank you Robert

Freeautomechanic on January 21st, 2012 at 12:58 pm

You should check to make sure you have a good ground connection and then check for battery positive when the key is first turned on.

robert on January 21st, 2012 at 2:21 pm

Thank you I will do that, I know the battery is hooked up clean. will check grounds and clean them up. Salt can do that around here. Thank you again. If that doesn’t work what could my next step. thank you robert

Freeautomechanic on January 21st, 2012 at 4:32 pm

If you find that you have a good ground and battery positive going to the fuel pump and zero fuel pressure(use gauge) then it is time to replace the fuel pump… this is assuming you have already made sure the fuel filter isn’t clogged.

robert on January 22nd, 2012 at 12:55 am

Thank you for your help. I hope to be able to help another some day here.

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1990 ford ranger fuel pump will not run