Pinpoint Test 1

PINPOINT TEST 1: THE TRAILER LAMPS ARE INOPERATIVE

Step 1 - 4:

Step 5 - 6:

Normal Operation
Power to the trailer tow lamps is controlled by the SJB. Circuits (Y) and (DG) supply power to the trailer tow LH and RH stop/turn lamps respectively. Circuit (BR/W) supplies power to the trailer tow parking lamps. Ground for the trailer lamps is provided on circuit (B).

Possible Causes
- circuit (Y) open or short to ground
- circuit (B) open
- circuit (DG) open or short to ground
- circuit (BR/W) open
- trailer
- SJB