ENGINE HOUR METER 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.

VOLTAGE TEST

HOUR

SCREW

INSTRUMENT

METER

PANEL

(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 instrument

panel.

(4) Set multimeter to volts dc.

(5) Left instrument panel out to reach hour

meter.

(6) Connect multimeter positive lead (+) to

hour meter where wire 10 connects.

(7) Connect multimeter negative lead () to

known good ground.

(8) Connect negative battery cable to

negative side of battery (Para 8-42).

(9) Turn engine start switch to ON position,

BUT DO NOT 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

ENGINE

wire 10 (Para 8-48).

START

(10) Turn engine start switch to OFF

SWITCH

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

(11) Disconnect negative battery cable from

negative side of battery (Para 8-42).

WIRE 10

TR01524

2-533