Test Step 1. Inspect Electrical Connectors and Wiring -807640473

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TM 9-2320-312-24-2

Troubleshooting Section

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Illustration 122

Schematic for ignore brake/clutch switch

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Illustration 123

Terminal Locations for ECM

Test Step 1. Inspect Electrical Connectors

Expected Result:

and Wiring

All connectors, pins, and sockets are completely

coupled and/or inserted, and the harness and

A. Thoroughly inspect the ECM vehicle harness

wiring should be free of corrosion, abrasion or pinch

connector J1/P1, the connectors, and the firewall

points.

bulkhead connectors. Refer to Troubleshooting,

"Electrical Connectors - Inspect" for details.

Results:

B. Perform a 45 N (10 lb) pull test on each of the

OK Proceed to Test Step 2.

wires in the ECM connector that are associated

with the circuit for the Ignore Brake/Clutch

Not OK Repair the wiring and connectors or

Switch.

replace the wiring or the connectors. Ensure that

all of the seals are properly connected. Verify that

C. Check the ECM connector (allen head screw) for

the repair eliminates the problem. STOP.

the proper torque of 6.0 Nm (55 lb in).

Test Step 2. Check the Status of the

D. Check the harness and the wiring for abrasion

Ignore Brake/Clutch Switch on ET.

and pinch points from the ignore brake/clutch

switch to the ECM.

A. Connect ET at the cab data link connector.

Refer to Illustration 123 for terminal locations

for the ECM.

B. Turn the ignition key switch to the ON position.