New Holland CX720 Repair Manual page 1304

4. ELECTRICAL TEST PROCEDURE 4: CONTINUITY TEST - CHECK FOR OPEN CIRCUITS CONDITIONS
FOR PERFORMING CONTINUITY TESTS:
1. Key switch OFF (sometimes disconnect battery or
pull fuses).
2. Connectors at both ends of the circuit disconnected.
All other connectors must be reconnected to perform
test.
3. Set meter to measure resistance or ohms, and mea-
sure circuit resistance as illustrated. Use the red meter
lead to touch the connector pins, one pin at a time, and
avoid contact with the case of metal connectors. Use
the black lead to make contact with the connector pin
at the other end of the circuit. Avoid contact with other
pins in the connector and the connector case, if it is
metal.
4. Determine if measured resistance falls within guide-
lines specified in the procedure. If the resistance is no
more than 3 - 4 ohms, the circuit is continuous. More
resistance usually indicates dirty or corroded terminals
in connectors, and 100K ohms indicates an open cir-
cuit.
IMPORTANT: Ensure that all steps are reviewed and followed when testing.
DISTRIBUTION SYSTEMS - ELECTRICAL POWER SYSTEM
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