STOPLIGHT DOES NOT OPERATE. (Cont) -725550211

TM 9-2330-385-14

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical

circuits, a direct short may result. Damage to equipment, injury, or death to personnel may occur.

Resistors mounted on exterior of junction box assembly reach very high temperatures when power is

applied to circuit. Avoid touching or contacting resistors when working in or around junction boxes.

Failure to comply could result in injury to personnel.

VOLTAGE TEST

(1) Remove four locknuts and rear

junction box guard. Discard

locknuts.

(2) Loosen four captive screws and

remove rear junction box.

(3) Connect positive (+) multimeter lead

to rear junction box, terminal 17.

(4) Connect negative (--) multimeter lead

to a known good ground.

(5) While assistant fully applies brake

pedal, observe multimeter.

(a) If 22 to 28 vdc are not present,

release brake pedal, and repair

wire 1003-17 (see schematic, Fig

FO-1) or replace wire harness

(b) If 22 to 28 vdc are present,

wire 1003-17 is OK.

(6) Release brake pedal.

VOLTAGE TEST

(1) Connect positive (+) multimeter lead

to rear junction box, terminal 30.

(2) Connect negative (--) multimeter lead

to a known good ground.

(3) While assistant fully applies brake

pedal, observe multimeter.

(a) If 22 to 28 vdc are not present,

release brake pedal and replace

rear junction box (Para 4-26).

(b) If 22 to 28 vdc are present,

release brake pedal and repair

wire 1004/22-30 (see schematic,

Fig FO-1) or replace composite

light harness (Para 4-30).

(4) Install rear junction box cover and

tighten four captive screws.

(5) Install rear junction box guard and

four locknuts.