CAB BLOWER DOES NOT OPERATE - continued

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.

CAB BLOWER

WITCH

SCREW

VOLTAGE TEST

(1) Remove battery cover (Para 8-42).

PANEL

(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) Raise heater and air conditioner

temperature control panel out to reach

heater/air conditioner switch.

(5) Set multimeter to volts dc.

(6) Connect multimeter positive lead (+) to

cab blower switch where jumper wires

connect pins 7, 8 and/or 5.

(7) Connect multimeter negative lead () to

known good ground.

(8) Turn engine start switch to ON position,

8 1 2 3

BUT DO NOT START ENGINE

7 4 5 6

(TM 10-3930-673-10).

(9) Turn heater/air conditioner switch to

S ENGINE

HEAT (TM 10-3930-673-10).

TART SWITCH

(a) If voltage is present, go to Step 3

of this fault.

(b) If voltage is not present, repair

jumper wire (Para 8-48).

(10) Turn heater/air conditioner switch OFF

(TM 10-3930-673-10)

(11) Turn engine start switch to OFF

position (TM 10-3930-673-10).

CAB BLOWER SWITCH

HEATER/

IR CONDIS IONER

WITCH

TR01115

2-463