Service Manual

HI/LOWSpeed,EngineSpeedandCuttingDeckLiftSwitches
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1
3
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g276000
Figure191
1.HI/LOWspeedswitch4.Centerdeckliftswitch
2.Enginespeedswitch
5.LHdeckliftswitch
3.RHdeckliftswitch
TheHI/LOW,enginespeedandcuttingdeckliftswitchesareallidentical
momentaryswitches.Theseswitchesarelocatedonthecontrolarm(Figure
191).
TheHI/LOWspeedswitchisusedasaninputfortheTECcontrollertoselect
eithertheHI(transport)orLOW(mow)tractionspeed.
Theenginespeedswitchisusedasaninputfortheengineelectroniccontrolunit
toraiseorlowertheenginespeed.Whentheswitchisdepressedandheldinthe
forwardposition,theenginespeedwillincrease.Conversely,whentherearof
theswitchisdepressed,enginespeedwilldecrease.
ThecuttingdeckliftswitchesareusedasinputsfortheTECcontrollertoraise
orlowerthecuttingdecks.Whenthefrontofaliftswitchisdepressed,the
controlleddeckswilllower.Whentherearofaliftswitchisdepressedandheld,
thecontrolleddeckswillraise.
Note:Toraiseorlowerthedecks,theoperatorseathastobeoccupied.Also,to
lowerthecuttingdecks,thetractionspeedhastobeinLOW(mow)range.
Testing
1.Beforedisconnectingaswitchfortesting,theswitchanditscircuitwiring
shouldbetestedasaTECinputwiththeInfoCenterDisplay(seeInfoCenter
Display(page6–6)).IftheInfoCenterveriesthattheswitchandcircuit
wiringarefunctioningcorrectly,nofurtherswitchtestingisnecessary.If,
however,theInfoCenterdeterminesthattheswitchandcircuitwiringarenot
functioningcorrectly,proceedwithtest.
2.MakesureignitionswitchisOFF .Removekeyfromignitionswitch.
3.Disassemblecontrolarmtogainaccesstoswitchthatistobetested(see
ControlArm(page8–22)).
4.Disconnectharnesselectricalconnectorfromtheswitchthatistobetested.
Groundsmaster
®
4000-D&4010-D
Page6–35
ElectricalSystem:ComponentTesting
13202SLRevF