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Page Title:
HIGH WATER TEMP INDICATOR LIGHT DOES NOT OPERATE - continued |
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 TM 10-3930-673-20-1
CONTINUITY CHECK
(1) Remove wire 14 and engine water
temp switch from bushing.
(2) Hang engine water temp switch in pan
of water. Position switch completely
under water. Do not let switch make
contact with pan.
(3) Place a thermometer in water.
(4) Put heat to pan of water and stir water
for consistent temperature of minimum
225F (161C).
BUSHING
Do not allow fingers or skin to contact
ENGINE WATER
hot water or hot parts. Serious burns
TEMP SWITCH
to personnel could result.
(5) Set multimeter to ohms.
WIRE 14
(6) Connect multimeter positive lead (+) to
center conductor of engine water temp
switch.
(7) Connect multimeter negative lead () to
ground of engine water temp switch.
WIRE 14
(a) If continuity is not present, replace
HIGH WATER
switch (Para 8-15).
TEMP
WIRE 10
(b) If continuity is present, install
INDICATOR
switch (Para 8-15) and go to
LIGHT SOCKET
Step 5 of this fault.
HIGH WATER
CONTINUITY CHECK
TEMP
SCREW INDICATOR
(1) Remove four screws and panel.
(2) Connect multimeter positive lead (+) to
wire 14 at high water temp indicator
PANEL
terminal.
(3) Using a known good jumper wire,
connect multimeter negative lead () to
wire 14 at engine water temp switch
terminal.
(a) If continuity is not present, replace
wire 14 (Para 8-48).
(b) If continuity is present, repeat
Step 3 through Step 5 of this fault.
TR01603
2-391
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