COLD START SYSTEM WILL NOT OPERATE. cont'd -680640284

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

Step 8. Check for +24 VDC between wire 284 (10) and ground at engine

temperature switch (11).

If +24 VDC is not present, repair wiring 284 between engine

temperature switch and connector E.

If +24 VDC is present, go to step 9.

Step 9. Check for +24 VDC between wire 286 (12) and ground at engine

temperature switch (11).

If +24 VDC is not present, remove screw (13) and lock washer

(14) and replace engine temperature switch (11).

If +24 VDC is present, go to step 10.

Step 10. Disconnect connector E (9) and check for +24 VDC between wire 286 (12)

and ground.

If +24 VDC is not present, repair wiring 286 between

connector E and engine temperature switch.

If +24 VDC is present, reconnect connector E and go to

step 11.

Step 11. Disconnect connector F (15) and check for +24 VDC between wire 286 (12)

and ground.

If +24 VDC is not present, repair wiring 286 between

connector F and engine temperature switch.

If +24 VDC is present, reconnect connector F and go to

step 12.

Step 12. Disconnect connector W (16) and check for +24 VDC between wire 286

(12) and ground.

If +24 VDC is present, replace cold start aid (page 4-55).

If +24 VDC is not present, repair wiring 286 between

connector W and connector F.

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