TEST OR INSPECTION
Remove rings, wristwatches, neck chains, and any other jewelry before working
around vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry
and tools may short across electrical circuits and cause damage to equipment, or
severe burns or electrical shock to personnel.
Connect air line at bumper turret elevation cylinder extend port. While an assistant
operates bumper turret control joystick to rear position (WP 0004), check for 22 to 28
VDC between bumper turret raise wire (black) at bumper turret junction box 9-pin
terminal strip, terminal 8 and a known good ground.
If 22 to 28 VDC are not present, go to Step 53.
Put bumper turret control POWER switch to
disconnect switch to OFF position (WP 0007). Check connections at bumper turret
junction box 9-pin and 5-pin terminal strips for loose connections.
If connections are loose, tighten loose connections (WP 0573).
If connections are not loose, replace bumper turret raise control
valve (WP 0573).