TM 9-2320-289-20
Table 2-4. Electrical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
24. WILL NOT SHUT OFF
Step 1.
Remove horn relay. (See paragraph 4-22)
If horn shuts off, replace relay.
If horn does not shut off, trace circuit. (See wiring diagram F-20 or F-21)
INSTRUMENT PANEL
25. BRAKE WARNING LIGHT FLICKERING OR WILL NOT TURN OFF
NOTE
Brake warning light operation is considered normal if brake warning light
turns on when brake pedal is rapidly applied or released and turns off with
next brake application.
Step 1.
Check that parking brake is fully released. If light stays on, disconnect lead from
parking brake switch. (See paragraph 4-17, REMOVAL, step 1)
If brake warning light goes out,
replace parking brake switch. (See
paragraph 4-17)
If brake warning light does not go out, perform step 2.
Step 2.
Disconnect lead at combination valve. (See paragraph 7-9, REMOVAL, step 5)
If brake warning light stays on, trace circuit. (See wiring diagram F-4 or F-5)
If brake warning light goes out, bleed brakes. (See paragraph 7-6) If brake
warning light still does not go out,
replace combination valve. (See
paragraph 7-9)
26. COOLANT LIGHT FLICKERING OR WILL NOT TURN OFF
Step 1.
Check coolant for proper level. (See TM 9-2320-289-10)
Step 2.
Turn key to “RUN” position. Disconnect black/yelIow lead from low coolant sensor
on radiator and touch to any ground.
If light goes out, replace low engine coolant sensor. (See paragraph 3-31)
If light does not go out, perform step 3.
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