TM 9-2320-363-102-2.INSTRUMENT PANEL (Con’t).KeyControl or IndicatorFunction1Air VentsVent air into cab from heater/ventilator/defrosterand air conditioner, if equipped. Louvered openingsare adjustable.9Air CleanerIndicates air cleaner air flow is adequate if gage isRestriction Indicatorclear. If restricted, indicator window will show up toGage (M916A1)20 inches of water. Push yellow reset button to resetafter air cleaner has been serviced.16Main Light SwitchFive-position switch. Operates the same as main(All Except M915A2light switch on other model trucks. Refer to item 16and M916A1)in subparagraph a(3).2-9
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