TM-9-2320-387-24-1

TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1

DECEMBER 1997

CHANGE 1

TM-9-2320-387-24-1 - Page 136 of 1205

TM 9-2320-387-24-l

ELECTRICAL

DIAGNOSTIC FLOWCHART

-

KNOWN INFO

1

OPTIONS

1. LOOK.

2. STEIICE-R

TEST 90

(Page 2-507).

NOTHING

WITH THE ROTARY SWITCH

TURNED TO STOP, ARE ALL

CIRCUITS EXCEPT THE LIGHTS

UNPOWERED?

POSSIBLE

PROBLEMS

REASON

FOR QUESTION

It’s important to verify that

there are no shorts which

SHORTS

OPENS

1

OPTIONS

TURN LIGHTS ON AND LOOK

KNOWN INFO

POWER IS OFF WHEN IT

SHOULD BE

DO ANY OF THE LIGHTS WORK

WITH THE ROTARY SWITCH IN

THE STOP POSITION?

REASON

FOR QUESTlON

POSSIBLE

PROBLEMS

The lights should work with the

rotary switch at STOP.

If the

lights work, power is making it

from the batteries through the

PCB to the light circuit.

OPENS

1

KNOWN INFO

T OPTIONS

TURN LIGHTS ON AND LOOK.

DO ALL OF THE LIGHTS WORK

WITH THE ROTARY SWITCH IN

ANY POSITION?

POWER TO THE LIGHT

CIRCUIT IS OK

REASON

FOR QUESTION

There may be problems which

only affect one light. rather

than all of them.

POSSIBLE

PROBLEMS

tNDtVlDUAL UGHTS MAY

HAVE BURNT BULBS,

BAD WIRES, ETC.

2-76