Measure the voltage between the No. 13 terminal of climate control unit connector B (16P) and body ground. Is there battery voltage?
YES | - | Check for loose wires or poor connections at climate control unit B (16P) and at A/C diode A 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■
NO | - | Repair open in the wire between A/C diode A and the climate control unit.■
Disconnect the jumper wire. Reinstall the A/C condenser fan relay. Disconnect the A/C condenser fan 2P connector. Turn the ignition switch ON (II), then turn the A/C and fan switches ON. |