Test Step 3. Test the PTO Switch ON Lamp Circuit

364

TM 9-2320-312-24-2

Troubleshooting Section

While the PTO Switch ON Lamp and the status

of PTO On/Off Switch is being monitored on ET,

turn the PTO On/Off Switch to the ON position

and the OFF position. The PTO Switch ON Lamp

should turn on when the PTO On/Off Switch is in

the ON position. Also, the PTO Switch ON Lamp

should turn off when the PTO On/Off switch is in

the OFF position.

Expected Result:

The lamp turns on and the lamp turns off per the

above description.

Results:

Yes The lamp appears to operating correctly

at this time. STOP.

No Proceed to Test Step 3.

Test Step 3. Test the PTO Switch ON

Lamp Circuit.

g00668711

Illustration 162

Vehicle harness connector P1

A. Disconnect ECM vehicle harness connector

Expected Result:

J1/P1.

Result 1 The PTO Switch On Lamp turns on while

the jumper is connected to both sockets. Also, the

B. Fabricate a jumper wire 100 mm (4 inch) long.

PTO Switch On Lamp turns off when the jumper is

Crimp a Deutsch pin to both ends of the wire.

removed from one of the sockets.

C. Insert the jumper into terminal 30 of connector

Result 2 The suspect lamp does not turn on while

P1.

the jumper is connected to both sockets.

D. Connect the other end of the jumper wire to

terminal 65 (-battery) of connector P1.

Result 3 The lamp will stay on while the ECM

vehicle harness connector is disconnected.

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

Results:

F. While the lamp is being watched, insert the

Result 1 The circuit for the PTO Switch ON

jumper wire and remove the jumper wire.

Lamp is functioning properly. Proceed to Test

Refer to Illustration 162.

Step 4.