Installation Manual

5 Testing & Troubleshooting
21
STEP #
12
Using a multimeter, check for MOTOR VOLTAGE between the negative (-) terminal of
the battery [#1] and the RED-WHT wire connected to each of the relay blocks 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. ARB #CO42
13
Disconnect the compressor motors from the wiring loom at the connector plug. Using
a 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.
14
Using a multimeter, check the continuity (resistance) between the each of the BLK-
WHT wire on 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.
NO
Wiring fault in the ground wire between the battery [#1] and the compressor motor.
Replace wiring.