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  1. #1

    GP1800 fuel pump wire harness color code

    Hey guys, just installing a high pressure fuel pump in my GP, but I need to solder the new wire harness from the fuel pump to the original pump harness (blue and black wires). Which one is positive? Blue? T

  2. #2
    Never mind, I plugged it in and used my tester..... if anyone else needs to know, Blue is positive


  3. #3
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by R-acer View Post
    ... Blue is positive
    Black wire is generally negative/ground.

    Some wire diagrams have been posted somewhere around here, IIRC.

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