WATER TEMPERATURE GAGE SHOWS NO INDICATION.

5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

44. WATER TEMPERATURE GAGE SHOWS NO INDICATION.

NOTE

Resistance will vary depending on water temperature.

Refer to wiring diagram for all wiring repair steps.

Disconnect wire 31T (1) from water temperature sending unit (2) and check

Step 1.

for resistance between terminal (3) and shell of water temperature sending

unit (2).

If there is no resistance, replace water temperature sending

unit (page 4-203).

If there is resistance, go to step 2.

Step 2. With wire 31T (1) disconnected from water temperature sending unit (2),

check for +24 VDC between wire 31T and ground at water temperature

sending unit.

If +24 VDC is present, replace water temperature sending unit

(page 4-203).

If +24 VDC is not present, go to step 3.

Step 3. With wire 31T (1) disconnected from water temperature sending unit, check

for +24 VDC between wire 31T and ground at connector D (4).

If +24 VDC is present, repair wiring 31T between connector D

and water temperature sending unit.

If +24 VDC is not present, go to step 4.

Step 4. Loosen two captive screws (5) and pull bracket (6) out enough to gain

access to area behind bracket.

Step 5. Remove two clamps (7) and pipe assembly (8).

Step 6. With wire 31T (1) disconnected from water temperature sending unit, check

for +24 VDC between wire 31T and ground at indicator (gage) (9).

If +24 VDC is not present, reconnect wire 31T at water

temperature sending unit and replace indicator (gage)

(page 4-124).

I f +24 VDC is present, reconnect wire 31T at water

temperature sending unit and repair wiring 31T between

indicator (gage) and connector D.