Question about Harley Davidson FLSTC Heritage Softail Classic Motorcycles

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03 Heritage Softail. Crank no start. Cannot hear fuel pump pressure up. No power to fuel pump fuse. Don't see a fuel pump relay. Only could locate 'System Relay?' Next step?

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  • ltomkins Jul 16, 2010

    Appears to be failed fuel pump due to bad fuel. Sock is rotted. I did not know the fuel circut was switched off once pressured or timed out. Any way thanks. I will re post if any other probs after fuel pump.

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  • Harley Davidson Master
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First trace the fuel pump fuse to the battery and, make sure you have power to the fuse you may need to replace the old wire from the battery to the fuse, if the power goes to the system relay but, doesn't come back out; replace the bad relay; still not working? next:
Connect a long 18 gauge wire between the fuel pump + or, positive (hot) connector and, the battery momentarily and, listen for the fuel pump motor to "buzz" If it does remove the wire and follow the hot wire up to the hidden relay; jump the relay, if it buzzes the fuel pump; replace the relay, if jumping the relay didn't work and the fuel pump still does not "buzz" check the pump ground: connect a wire between a bare, unpainted area on the frame and, the - negative (ground) fuel pump connector start up the fuel pump, normally if it now buzzes replace the ground wire or, scrape the place where the ground wire attaches to the frame and, re install the ground screw.

Posted on Jul 14, 2010

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