Step6:Measure48VdcpowerinmainharnessconnectorsP44and
P45.
Note:ConnectordiagramsareavailableinStep7.
1.Verifythattheengineisshutoff.
2.DisconnectmainharnessconnectorsP44andP45fromthecuttingreelmotorcableconnectors.
3.RotatetheignitionkeytotheONposition.
4.Measurethevoltagebetweenpins1and2ofconnectorP45.Thereadingshouldbe48Vdc.
5.MeasurethevoltagebetweenP44pin1andP45pin2.Thereadingshouldbe48Vdc.
6.RotatetheignitionkeytotheOFFposition.
Pass
Thevoltagereadingsweregood.GotoReturningtheMachinetoService(page22)andfollow
thestepslisted.
Fail
Thevoltagereadingswerenotgood.GotoStep7.
Step7:Testthepowerandgroundwiringinmainharnessconnectors
P44andP45.
1.ThesearediagnosticstepstohelpisolateproblemsidentiedinStep6.Useamultimetertotestthe
resistancebetweenthefollowingpairsoflocations:
LocationHarness
Connector
Pin
Wire
Color
Expected
Reading
ConnectorGraphic
1MainP451Red
2MainP373Red
Lessthan
2ohms
1MainP452
Black
(48V
Ground)
2MainP374
Black
(48V
Ground)
Lessthan
2ohms
331