TM 5-3805-258-24-1OPERATOR’S STATIONINDIVIDUAL CIRCUIT DESCRIPTIONSYSTEMS OPERATIOND. Transmission Neutralizer (With Transmission in Gear)This condition has two different circuits connected to the operator panel. Ituses the same normally open 9G8009 Pressure Switch in the air lines to theparking brake, that makes just the parking brake indicator turn on. There isalso a circuit that uses a 9N1750 Switch mounted on the transmissionlinkage, This switch is closed when the transmission is in NEUTRAL but isopen when the transmission is in a FORWARD or REVERSE speed.With the transmission in gear and the parking brake engaged, the parkingbrake indicator on the operator panel is ON and the operator panel sendscurrent to turn ON the master fault light. If the fuel pressure switch is open(engine running), the operator panel also sends current to activate the faultalarm.The parking brake pressure circuit connects to Pin 19 of the operator paneland the transmission neutralizer switch circuit connects to Pin 9. Pin 11 ofthe operator panel goes to the master fault light and Pin 10 goes to the faultalarm.T R A N S M I S S I O N N E U T R A L I Z E R S W I T C H1. Transmission neutralizer switch.3-162
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