Service Manual

Table Of Contents
ParkingBrakeSwitch
POSITIONCLOSED
CIRCUITS
ON
2+3,5+6
OFF
1+2,4+5
Theparkingbrakeswitchislocatedonthemaininstrumentpanel.Pushdownon
thetopoftheswitchtoengagetheparkingbrake(switchlightilluminated)and
pushdownonthebottomoftheswitchtodisengagetheparkingbrake.
TheT1:TECmonitorsthepositionoftheparkingbrakeswitch.Theparking
brakeisspringloadedandengagesautomaticallywhenhydraulicpressureis
notpresent.Whentheengineisrunningandtheparkingbrakeswitchissetto
theOFFposition,theT1:TECenergizesthehydraulicsolenoidvalve(SV2)to
pressurizethebrakecircuitanddisengagethebrake.
TestingtheParkingBrakeSwitch
TheparkingbrakeswitchanditscircuitwiringcanbetestedasaT1:TEC
inputusingtheInfoCenterDisplay;refertoUsingtheInfoCenterDisplayfor
Troubleshooting(page3–23).Iftestingdeterminesthattheswitchandcircuit
wiringarenotfunctioningcorrectly,proceedwiththefollowingtestprocedure:
1.Parkthemachineonalevelsurface,loweranyattachmentsandstopthe
engine.
2.Disconnectthebatterynegative(-)cableatthebattery.
3.Removetheinstrumentpanelfromthedash.
4.Disconnectthewireharnessconnectorfromtheswitchandremovethe
switchfromtheinstrumentpanelifnecessary.
5.Useamultimeter(ohmssetting)andtheprecedingtabletodetermine
whethercontinuityexistsbetweenthevariousterminalsforeachswitch
position.
6.Theswitchindicatorlightcanbetestedbyapplying(+)12VDCtoterminal8
anda(-)groundtoterminal7.
7.Replacetheswitchifnecessary.
8.Iftheswitchtestscorrectlyandacircuitproblemstillexists,checkthewire
harnesses;refertoAppendixA(pageA–1).
9.Installtheswitch,connectthewireharnessandinstalltheinstrumentpanel
aftertesting.
10.Connectthebatterynegative(-)cableatthebattery.
Outcross9060
Page6–29
ElectricalSystem:ElectricalComponentTesting
18234SLRevD