Test Step 1. Inspect Electrical Connectors and Wiring -807640378

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TM 9-2320-312-24-2

Troubleshooting Section

Test Step 1. Inspect Electrical Connectors

and Wiring.

g00840659

Illustration 61

Terminal locations for the ECM connector (P1)

D. Check the harness and the wiring for abrasion

A. Thoroughly inspect the ECM vehicle harness

and pinch points from the battery to the ECM.

connector J1/P1, the connector on the clutch

Then, check from the ignition key switch to the

for the A/C compressor, the connections to the

ECM.

cooling fan solenoid, and the firewall bulkhead

connectors. Refer to Troubleshooting, "Electrical

E. Ensure that the cooling fan on the vehicle is

Connectors - Inspect" for details.

wired to the ECM. Check for wires that are

connected to terminal 11 (output 5), terminal 62

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

(input 12) or terminal 41 (input 11).

wires in the ECM connector that are associated

with the following connections:

Refer to Illustration 61 for terminal locations for

Cooling fan

the ECM.

circuit for the clutch of the A/C compressor

Expected Result:

All connectors, pins, and sockets are completely

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

coupled and/or inserted, and the harness and

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

wiring should be free of corrosion, abrasion or pinch

points.