Climate Control Power and Ground Circuit Troubleshooting
|1.||Check the No. 10 (7.5A) fuse in the under-dash fuse/relay box.|
Is the fuse OK?
YES - Go to 2.
NO - Replace the fuse, and recheck.n
|2.||Disconnect climate control unit 28P connector.|
|3.||Turn the ignition switch ON (II).|
|4.||Measure the voltage between the No. 3 terminal of climate control unit 28P connector and body ground.|
Is there battery voltage?
YES - Go to 5.
NO - Repair open in the wire between the No. 10 fuse in the under-dash fuse/relay box and the climate control unit.n
|5.||Turn the ignition switch OFF.|
|6.||Check for continuity between the No. 5 terminal of climate control unit 28P connector and body ground.|
Is there continuity?
YES - Check for loose wires or poor connections at climate control unit 28P 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.n
NO - Check for an open in the wires between the climate control unit and body ground. If the wire is OK, check for poor ground at G402.n