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Home >> GMC >> 1969 >> P35/P3500 Van 2.6L Eng VIN T >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Computer Command Control >> Maintenance & Testing >> Reversing Relay
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Reversing Relay

Make sure all wires are connected to reversing relay and to transmission switch. A loose wire could cause solenoid to remain energized. Turn ignition on and remove purple wire from reversing relay, solenoid should de-energize. If solenoid de-energizes, reversing relay is faulty.