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 then plugs into your vehicles harness.
The longer yellow wire gets connected to an ignition switched 12V+ source to turn the alternator on and off with the key, and also prevents 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. This harness is included with all Mechman alternators that need this to function properly right out of the box. Not using this harness in the 6 phase style alternators we offer will generally create a low RPM no charge/battery light. If we include the harness, then you need the harness!
The longer yellow wire gets connected to an ignition switched 12V+ source to turn the alternator on and off with the key, and also prevents 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. This harness is included with all Mechman alternators that need this to function properly right out of the box. Not using this harness in the 6 phase style alternators we offer will generally create a low RPM no charge/battery light. If we include the harness, then you need the harness!
5 Reviews
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Alternator harness
It works as it should and they got it to me fast
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Works as described.
Simple installation process to upgrade my standard alternator to 400amp
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H104l
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
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Hi
Good
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H104 indicator light harness
Fixed my problem right up battery light went off an have been excellent help an service with me! I will be contacting them to get a couple more alternator's for future projects
