ARB CKMA12 Installation Manual page 22

5 Testing & Troubleshooting
S T E P #
Using a multimeter, check for MOTOR VOLTAGE between the negative (-) terminal of
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the battery [#1] and the RED-WHT wire connected to the relay block and while the
relay is still connected. Pierce the RED-WHT wire with the multimeter probe to make
connection if necessary.
Was MOTOR VOLTAGE detected?
YES Proceed to STEP 13.
NO Relay fault. Replace with a new 12V - 40A relay of the same type.
Disconnect the compressor motor from the wiring loom at the connector plug. Using a
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multimeter, check for MOTOR VOLTAGE between the negative (-) terminal of the
battery [#1] and the RED-WHT wire on the loom side of the plug.
Was MOTOR VOLTAGE detected?
YES Proceed to STEP 14.
NO Wiring fault between the relay and the compressor motor connector. Replace wiring.
Using a multimeter, check the continuity (resistance) between the BLK-WHT wire on
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the loom side of the plug (not on the compressor side) and the negative (-) terminal of
the battery [#1].
Did the resistance measure less than 1 Ohm?
YES
Intermittent wiring fault or internal compressor problem. Contact ARB.
Wiring fault in the ground wire between the battery [#1] and the compressor motor.
NO
Replace wiring.
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