H104 Indicator light harness for 1996-2004 GM Truck


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1.00 LBS
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This adapter harness is supplied with all MechMan hairpin alternators for 1996-2004 GM Trucks and SUV's. It accepts oval GM alternator plugs, and plugs into oval GM alternators. The longer blue wire gets connected to an ignition switched 12V+ source to turn the alternator on and off with ignition, and also prevent the "check battery" light from coming on in the dash. This harness can also be modified and hardwired to ignition 12V+ for engine swap applications where the stock alternator harness is not available.

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  • 5
    Works as described.

    Matt | 29th Aug 2023

    Simple installation process to upgrade my standard alternator to 400amp

  • 5

    Peter | 13th Aug 2023

    Used this for a CES alternator that when installed made my battery light flash on and off , installed this harness plug , tapped into fuse box with an add a fuse , battery light went off and I'm goo to go ! Did exactly what it was supposed to do , just wish I had bought the harness that bumps voltage up a volt , but am going to buy that now