TM 10-3930-641-20
ELECTRICAL SYSTEMS TROUBLESHOOTING (CONT)
(Sheet 1 of 1)
PROBLEM NO. 10
HORNS
OPERATOR AUDIBLE WARNING HORN DOES NOT WORK
POWER switch ON. PANEL TEST switch ON.
TEST LOW ENGINE OIL PRESSURE SWITCH IF VOLTAGE IS PRESENT AT HORN
When the PANEL TEST switch is closed, circuit flows from PANEL TEST switch, through warning horn relay coil, through low engine oil pressure
switch to ground. (See page 2-327.)
OPERATOR WARNING HORN CIRCUIT
