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Passenger Side Wiring Harness

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3:15 p.m.: There are several wires exiting the rear passenger side of the throttle body. The three-prong connector (shown) has the air conditioning idle circuit activation (orange), ignition output when used with timing controls (yellow) and the required tach input (white) which will attach to the gray tach lead coming from our MSD HEI module. A two-prong plug connects to the engine coolant temperature sensor, and another harness coming from the rear of the throttle body plugs into the ECM.