Climate Control Power and Ground Circuit Troubleshooting
Climate Control Power and Ground Circuit Troubleshooting1. Check the No. 36 (10 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 2.
NO - Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 36 (10 A) fuse circuit.
2. Disconnect the climate control unit connector B (16P).
3. Turn the ignition switch ON (II).
4. Measure the voltage between the climate control unit connector B (16P) No. 16 terminal and body ground.
Is there battery voltage?
YES - Go to step 5.
NO - Repair open in the wire between the No. 36 (10 A) fuse in the under-dash fuse/relay box and the climate control unit.
5. Turn the ignition switch to LOCK (0).
6. Check for continuity between the climate control unit connector A (24P) No. 24 terminal and body ground.
Is there continuity?
YES - Check for loose wires and poor connections at the climate control unit connector A (24P). If 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 - Check for an open in the wire between the climate control unit and body ground. If the wire is OK, check for poor ground at G571.