TM 10-3930-641-20
ELECTRICAL SYSTEMS TROUBLESHOOTING (CONT)
(Sheet 1 of 3)
PROBLEM NO. 26
SERVICE LIGHTS
STOP LIGHT(S) DO NOT WORK
POWER switch ON. Brake pedal pressed. Indicator lights come ON when PANEL TEST
switch is ON (see NOTE).
NOTE
Brake light switch receives its power from same circuit that feeds the panel test lights. If all indicator
lights do not come on, see PROBLEM 12. If all indicator lights do come on, problem is between
yellow connector and lamps or in the lamps.
This circuit uses a normally open pressure switch which closes when brake pedal (left or right) is pressed.
Go on to Sheet 2