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This adapter harness is supplied with all MechMan hairpin alternators for Supercharged 2003-2004 Ford Mustang Cobra's. It accepts oval GM alternator plugs (on the Mechman Alternator) and then plugs into your vehicles harness. All connections are crimped and epoxied for ultimate durability against loose connections and contaminants.
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!
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