A/C Signal: Testing and Inspection

1. Attach positive probe of voltmeter to No. 10 blue/red terminal and negative probe to No. 32 black terminal of control unit connector.
2. Start engine and ensure compressor and cooling fan operate with blower and A/C switches on.
3. Check voltage. If there is voltage, check for continuity between A/C switch wire terminal and control unit blue/red wire terminal.