Diesel Data: Automotive Repair

10C A/C Cut Out Relay


1. Place ignition switch in the Off position.
2. Disconnect electrical connectors from A/C cut-out relay.
3. Connect an ohmmeter between relay terminal Nos. 1 and 4.
4. If ohmmeter indicated resistance, check dark blue/orange wire from A/C cut-out relay electrical connector to ignition switch for an open circuit.
5. If ohmmeter indicates an open circuit, replace A/C cut-out relay.