COVER 8M2782 - Caterpillar

Step 1. CHECK EMS TEST SWITCH CIRCUIT
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the machine harness from the EMS control.
Check the continuity of the test switch circuit in the machine harness. At the machine harness connector for the EMS control, measure the resistance from contact 15 to frame ground. Hold the EMS test switch in the TEST position while doing the check.Expected Result:Resistance is greater than 5 ohms.Results:
OK - The machine harness or test switch is faulty.Repair: Repair or replace the test switch and/or harness.STOP
NOT OK - The EMS control is faulty.Repair: Replace the EMS control. See EMS Control Replacement.STOP