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Page Title:
HEATER DOES NOT OPERATE - continued |
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 TM 10-3930-673-20-1
Remove rings, bracelets, watches, necklaces, and any other jewelry before working around vehicle. Jewelry can catch on equipment
and cause injury or short across electrical circuit and cause severe burns or electrical shock. Battery acid is harmful to skin and eyes.
Always wear eye protection when working with batteries.
A
HEATER AND
IR CONDIS IONER
T
SCREW
WITCH
PANEL
VOLTAGE TEST
(1) Remove battery cover (Para 8-42).
(2) Disconnect negative battery cable from
negative side of battery (Para 8-42).
(3) Remove four screws from heater and
air conditioner temperature control
panel.
(4) Set multimeter to volts dc.
(5) Raise heater and air conditioner
temperature control panel out to reach
heater/air conditioner switch.
(6) Connect multimeter positive lead (+) to
heater/air conditioner switch where
8 1 2 3
wire 80 (red wire) connects pin 5.
(7) Connect multimeter negative lead () to
7 4 5 6
known good ground.
S
ENGINE
(8) Connect negative battery cable to
TART SWITCH
negative side of battery (Para 8-42).
(9) Turn engine start switch to START
WIRE 80
position, START ENGINE
(TM 10-3930-673-10).
(a) If 24 vdc is present, go to Step 3 of
this fault.
(b) If 24 vdc is not present, repair
wire 80 (Para 8-48).
(10) Turn engine start switch to OFF
position (TM 10-3930-673-10).
(11) Disconnect negative battery cable from
negative side of battery (Para 8-42).
A
HEATER AND
IR CONDIS IONER
T
WITCH
TR01073
2-445
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