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CHUCKTNASTY

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  1. CHUCKTNASTY

    so if the fuse and relay are good and there is is no module .What else is in the control side of pump?What two spots where the realay plugs in can i jump out to check pump out?THANK YOU FOR YOUR HELP

  2. CHUCKTNASTY

    my truck is a extended cab 2 full doors and 2 half doors.my code was fuel pump control side.I have checked the fuse the relay both are good.I also just recently Replace my gas pedal while doing so i accidently pulled the purple wire out of the plug connector i put it back in best that i could and it drove fine.I turned it off went to crank it back it would just turn over and no fuel pump. Could that purple wire going to gas pedal affect the control side of fuel pump.DID SOME TRUCKS HAVE THAT MODULE UNDER SEAT IN BACK?

          Thank you very much for your help!!!!!!

    1. Jsdirt

      Jsdirt

      That purple wire is the ground for the APP (accelerator pedal position) sensor - the ground is provided by the ECU. I don't know enough about how the system works to give a definitive answer on whether or not that can shut the fuel pump off. I doubt it, but, since its a computer controlled ground, anything is possible. The thing to do would be to check for a ground up at the pedal with an incandescent test light (NOT an LED light!) clamped to battery positive - if the ground connection is good, you should have it light up when touching above the point where you broke the connection. 

       

      As far as the location of the module, someone replied to your post in the Ask The GM Tech thread, that the trucks with the 4.3 do not have a fuel pump control module. I suspected that, so I believe he is right.

       

      Hope this helps.

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