Turn the ignition switch off. Check for continuity between the following terminals of the push switch 10P connector and the recirculation control motor 5P connector. 10P: 5P: No. 5 No. 1 No. 6 No. 2 PUSH SWITCH 10P CONNECTOR Wire side of female connector RECIRCULATION CONTROL MOTOR 5P CONNECTOR Wire side of female terminals Is there continuity? YES - Go to step 12. NO - Repair any open in the wire(s) between the push switch 10P connector and body ground. Check for continuity between the No. 2 terminal of the push switch 10P connector and body ground. PUSH SWITCH 10P CONNECTOR Wire side of female terminals Is there continuity? YES - Replace the push switch. NO - Check for an open in the wire between the push switch and body ground. If the wire is OK, check for poor ground at G501.

Remove the recirculation control motor (see page 21-49). Check the recirculation control linkage and doors for smooth movement. Do the recirculation control linkage and doors move smoothly? YES - Replace the recirculation control motor. NO - Repair the recirculation control linkage or doors.