Step6:Measure48VdcpowerinmainharnessconnectorsP48and
P49.
Note:ConnectordiagramsareavailableinStep7.
1.Verifythattheengineisshutoff.
2.DisconnectmainharnessconnectorsP48andP49fromthecuttingreelmotorcableconnectors.
3.RotatetheignitionkeytotheONposition.
4.Measurethevoltagebetweenpins1and2ofconnectorP49.Thereadingshouldbe48Vdc.
5.MeasurethevoltagebetweenP48pin1andP49pin2.Thereadingshouldbe48Vdc.
6.RotatetheignitionkeytotheOFFposition.
Pass
Thevoltagereadingsweregood.GotoReturningtheMachinetoService(page22)andfollow
thestepslisted.
Fail
Thevoltagereadingswerenotgood.GotoStep7.
Step7:Testthepowerandgroundwiringinmainharnessconnectors
P48andP49.
1.ThesearediagnosticstepstohelpisolateproblemsidentiedinStep6.Useamultimetertotestthe
resistancebetweenthefollowingpairsoflocations:
LocationHarness
Connector
Pin
Wire
Color
Expected
Reading
ConnectorGraphic
1MainP491Red
2MainP373Red
Lessthan
2ohms
1MainP492
Black
(48V
Ground)
2MainP374
Black
(48V
Ground)
Lessthan
2ohms
327