BLACKOUT STOPLIGHT(S) DO NOT OPERATE. (Cont) -725550233

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.

CONTINUITY TEST

(1) Set multimeter select switch to

volts dc.

(1.1)If LED composite light is installed,

disconnect wire 1678/23-28.

(2) Connect positive (+) multimeter lead

to wire 1678/23-28 at blackout

stoplight connector.

(3) Connect negative (--) multimeter lead

to a known good ground.

(4) Turn on BLACKOUT LIGHTS selector

switch.

(5) While assistant fully applies brake

pedal, observe blackout stoplights.

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

perform Steps (6) thru (8) below

and repair wire 1678/23-28 (see

schematic, Fig FO-1) or replace

composite light wire harness

(b) If 22 to 28 vdc are present and

composite light is installed, wire

1678/23-28 is OK. Fault not

corrected. Perform Steps

(6) thru (8) below and notify

supervisor.

LED composite light is installed,

Perform Steps (6) thru (8) below

and replace LED composite light

(6) Release brake pedal.

(7) Turn off BLACKOUT LIGHTS selector

switch.

(8) Connect wire 1678/23-28 connector to

blackout taillight connector.