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 110 of 524

TM5-2330-378-14&P

4-16. TROUBLESHOOTINGCHART(continued).

a. LIGHTS (continued) (5) TURN SIGNALS DO NOT WORK (M870).

Initial Setup:

Tools/Test Equipment:

- Parking brake applied (see operator's manual

• Tool kit, general mechanic's:

automotive

fortowing vehicle).

(item 7, Appendix B)

- Wheels chocked (para 2-10).

• Multimeter (item 8, Appendix 13)

Personnel Required:

Two

Eq uIpment Conditions:

-Semitrailer

coupled to towing vehicle. Engineoff

(see operators

manual for towing vehicle).

NOTE

The wires feeding tu m-signal lights are color

coded, and both feed wires are connected

to red lead wire on turn-signal

light housing.

Left turn-signal

light is coded white, and

right turn-signal

light is coded brown.

This

procedure

applies to either tu m-signal light.

A.

Are both turn signals inoperative?

GO TO STEP

B.

Remove lens from light that does not work (para

4-32). Using multimeter set for continuity test-

ing, place red probe on base terminal and black

probe on side of lamp.

Is continuity present?

-

'4@

Replace bulb (para 4-32).

Verify proble

p

sol

so

F

Ived.

continued

on next page

4-22