Failsafe alarm monitor (warning control module) for all of the M939 series trucks. P/N 11669142. NSN 6350010892987.
Controls various warning lights on the dash, including low air and parking brake, and sounds its built in alarm when a problem occurs. Made in USA. New/unused.
No export from USA.
A, from engine ignition circuit
B, blackout override input
C, not used
D, to engine temp switch
E, to engine over temp light
F, to air pressure switches
G, to low air warning light
I, to parking brake switch
J, to parking brake warning light