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1990 Dodge Dakota Question: no fuel, pump o k, suspect fuel pump relay or asd relay. where are they located

 

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Visitor, 3.9L V6, Chico, CA, March 29, 2011, 15:25

drove into parking spot ran o.k. came back 5 minutes later engine wont start. no fuel, pump does not run suspect fuel pump relay or asd relay but cant locate them on the vehicle also dont know how to identify either one help

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  • Answer #1

    mastertech6371 March 29, 2011, 16:07
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     Master

    how do you know the pump is ok?? is there power back there with key on engine off for 2 seconds??
    if you have spark, then asd relay is good.
    fuse block will id the relays.

    Roy

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  • Answer #2

    Johnny Mopar March 29, 2011, 18:47
     Master

    There is a bank of relays on the driver's side fender. You only have an ASD relay. It should be the 2nd from the front. First one is A/C Clutch, ASD, Radiator Fan (2.5L) and Starter Relay. More than likely, your fuel pump has failed. Sometime you can get it working by tapping the fuel tank with a rubber mallet while someone turns the key to start the engine. What usually happens is that the motors brushes either wear out or stick in there respective holders thus not making contact with the armature. If you are mechanically inclined, you can unplug the relay connector and check for 12 volts at the relays connector terminal #30 to ground. If voltage is present, you can run a short jumper wire to terminal #87 on the relay connector. this will power up the fuel pump circuit. CAUTION: If you jump the wrong terminals you WILL HAVE to replace your Powertrain Control Module.

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    jonirwin, February 21, 2013, 21:42
     Rookie

    ok so i think i did what u said not to do so how would i replace the pcm and is it a sure thing that it is bad

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