TM-5-2330-378-14-P

SEMITRAILER, LOWBED: 40 TON CONSTRUCTION EQUIPMENT TRANSPORTER M870 AND M870A1

TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

JUNE 1999

TM-5-2330-378-14-P - Page 101 of 524

TM5-2330-378-14&P

4-16. TROUBLESHOOTINGCHART(continued).

a. LIGHTS (continued) (1) NO TRAILER LIGHTS WORK (M870) (continued).

CONTINUED

FROM STEP B

d&*

2

411100

qqW

[R

la

7

intervehicular

cable (refer to operator's

m

M:pn

al for towing vehicle).

Verify problem is

s

s

olved.

C.

Open front cover of voltage reduction box (2)

(para4-35).

Locate junction block (3) on left side

of box. With power connected

to semitrailer and

using multimeter

set at 30 V c1c,place red probe

on junction block terminals

and ground black

a

probe.

Does multimeter

show any voltage?

R@place voltage

reduction

box (2

(p,

(pa

F

ra4-35).

Check

wiring

harness.

Replace wiring

harness if any breaks are found (para 4-34).

Verify problem

is solved.

END OF TASK

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