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How to check fuel pump wire tap with volt meter ?

Posted

Is there a way to check if my fuel tap is working using a volt meter  ? Truck is a 99 

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  • Author
40 minutes ago, Mopar1973Man said:

Turn the ignition on engine not running you should see 12V at the tap wire.

I did this but with the key off and it was showing the 12 volts so I’m probably good then. Thanks 

  • Owner

Nope...

 

Wire is not attached to the tuner. The wire must be attached to the pump only. There should only be 12V with the key on engine off. 

 

Your most likely seeing the tuner not the VP44 tap.

  • Author
14 minutes ago, Mopar1973Man said:

Nope...

 

Wire is not attached to the tuner. The wire must be attached to the pump only. There should only be 12V with the key on engine off. 

 

Your most likely seeing the tuner not the VP44 tap.

Awesome thank you 

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