Climate Control Power and Ground Circuit Troubleshooting

1.Check the No. 36 (10 A) 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 the climate control unit 32P connector.

3.Turn the ignition switch ON (II).

4.Measure the voltage between the climate control unit 32P connector terminal No. 3 and body ground.

 

Is there battery voltage?


YES - Go to 5.


NO - Repair an open in the wire between the No. 36 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 climate control unit 32P connector terminal No. 5 and body ground.

 

Is there continuity?


YES - Check for loose wires and poor connections at the climate control unit 32P connector. 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.n


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 G504.n