2002 48" Walker MTGHS with CH20S Kohler 64554 Engine. Approx. 600 hrs. Not an EFI. Gasoline. One owner. Well maintained. Cannot identify electrical short.
Issue: While in RUN, engine running or not running, Red and Purple wires at ignition switch become extremely hot, ultimately tripping 30A auto reset breaker.
What I know:
1. Red is battery ("B"), Purple is accessory ("A"), Purple feeds control panel accessories (oil pressure, head temp, voltage meter, hour gauge) AND is the B+ feed to the regulator/rectifier ("VR") see MT Electrical Schematic and Kohler Wiring Diagram, attached hereto
2. This is an electrical issue and not a fuel delivery issue.
3. Battery good.
3. Starter/solenoid good.
4. No noticeable compromise to wiring.
5. anti backfire solenoid good.
6. ignition switch good.
7. safety interlocks good.
8. Issue goes away when I disconnect the VR.
9. VR adequately grounded.
10. With VR disconnected, and engine running, the two white stator wires (2 wires of 3-prong plug connecting to VR) put out AC 42A. Purple B+ wire (3d wire of 3-prong plug connecting to VR) measures 12+v, which all makes sense.
11. But, with VR disconnected, and engine running, the two stator wires show a short to ground.
Could the short to ground in the stator be the cause of the Red and Purple wire becoming extremely hot at the ignition switch, ultimately tripping breaker? Or is there a diode(s) in the stator wiring that is causing this phenomenon?
The wiring diagrams do not reflect diodes in the stator wiring, but there must be diodes involved either in the wiring or in the VR to convert AC to DC. I haven't wanted to pull the engine to access wiring and stator. Hoping it is something else I can fix without replacing stator, or magnets because of difficulty pulling engine from Walker frame.
Here is what is gong to engine from engine harness plug:
Red wire connected to Purple wire, which is the B+ feed from VR back through ignition switch to charge battery, and anti backfire??
Red wire connected to Blue wire (blue goes to starter solenoid, Red to anti backfire or other??) I know anti backfire engages in Run and Start
white kill wire to magneto
one green wire, presumably going to oil pressure switch
Two black wires connected at same terminal (presume that one goes to the head temp switch; don't know about 2d black wire??)
Hoping this is not too much information that it is confusing. I need help understanding why the Red and Purple wires at B and Acc at the ignition switch are getting hot and tripping breaker when in Run position. All signs point to bad stator but hoping it is something else.
Really do appreciate any and help you might give me.
Thanks
PS. Tried to upload the Kohler CH20 Service manual that contains the wiring diagram but file too large
Issue: While in RUN, engine running or not running, Red and Purple wires at ignition switch become extremely hot, ultimately tripping 30A auto reset breaker.
What I know:
1. Red is battery ("B"), Purple is accessory ("A"), Purple feeds control panel accessories (oil pressure, head temp, voltage meter, hour gauge) AND is the B+ feed to the regulator/rectifier ("VR") see MT Electrical Schematic and Kohler Wiring Diagram, attached hereto
2. This is an electrical issue and not a fuel delivery issue.
3. Battery good.
3. Starter/solenoid good.
4. No noticeable compromise to wiring.
5. anti backfire solenoid good.
6. ignition switch good.
7. safety interlocks good.
8. Issue goes away when I disconnect the VR.
9. VR adequately grounded.
10. With VR disconnected, and engine running, the two white stator wires (2 wires of 3-prong plug connecting to VR) put out AC 42A. Purple B+ wire (3d wire of 3-prong plug connecting to VR) measures 12+v, which all makes sense.
11. But, with VR disconnected, and engine running, the two stator wires show a short to ground.
Could the short to ground in the stator be the cause of the Red and Purple wire becoming extremely hot at the ignition switch, ultimately tripping breaker? Or is there a diode(s) in the stator wiring that is causing this phenomenon?
The wiring diagrams do not reflect diodes in the stator wiring, but there must be diodes involved either in the wiring or in the VR to convert AC to DC. I haven't wanted to pull the engine to access wiring and stator. Hoping it is something else I can fix without replacing stator, or magnets because of difficulty pulling engine from Walker frame.
Here is what is gong to engine from engine harness plug:
Red wire connected to Purple wire, which is the B+ feed from VR back through ignition switch to charge battery, and anti backfire??
Red wire connected to Blue wire (blue goes to starter solenoid, Red to anti backfire or other??) I know anti backfire engages in Run and Start
white kill wire to magneto
one green wire, presumably going to oil pressure switch
Two black wires connected at same terminal (presume that one goes to the head temp switch; don't know about 2d black wire??)
Hoping this is not too much information that it is confusing. I need help understanding why the Red and Purple wires at B and Acc at the ignition switch are getting hot and tripping breaker when in Run position. All signs point to bad stator but hoping it is something else.
Really do appreciate any and help you might give me.
Thanks
PS. Tried to upload the Kohler CH20 Service manual that contains the wiring diagram but file too large