Test - TM-5-4930-233-140229

TM 5-4930-233-14

TM 4930-14/1

WIRING HARNESS OR TRAILER ELECTRICAL

4-53. JUNCTION BOX - TEST/REPLACE - (Cont.)

(5)

If voltage is not present at any location, replace junction box.

(6)

If voltage at terminals 1 and 2 is above 12 Vdc replace junction box.

(7)

Hook up intervehicular cable at commercial style (12 Vdc) connection.

(8)

Turn on towing vehicle headlights and clearance lights. Step on brake.

(9)

See the power output chart (Table 4-6) and junction box wiring diagram and check power outputs

for commercial and military modes. It will be necessary to activate the appropriate turn signals to

test terminals 3 and 4.

(10)

If voltage is not present at any location, replace junction box.

4-155