Smedium C
Member
Hey guys, this is my first technical post. Thank y'all for all the previous help I've found through searching old posts. I've learned quite a bit from this forum already.
I have a John Deere 850 compact utility tractor. Not exactly sure of the year as the serial number plate was missing when I got it. From what I've read in the manual though it seems to be an earlier model as there is not a two-stage clutch.
The problem I'm having is with the CHG indicator light. When I first got it there was a parasitic draw on my battery which I tracked back to my indicator cluster. Bought a new one and replaced it. The CHG light was working fine but remained on. Did some more tracking and found my voltage regulator bad. So I replaced that. Before I was able to replace the regulator the CHG light went out. I had read that burning lamps was a common thing with these so paid no mind.
I've now replaced the regulator and the light bulb in the lamp assembly and still no CHG light. From what I have read this can cause a problem with charging as the light is the first step in the process.
Things I've tried:
Removed and cleaned fuse and fuse box connection.
Checked fuse plugs were in correctly
Cleaned battery terminals/ground
Cleaned alternator connections
Swapped old assembly with new bulb
Checked battery and alternator volts (battery voltage seems to be around the same whether engine is off or has idled and decent RPM - after idling goes up slightly. Alternator is showing very low to zero when connecting to terminal and ground and I think this has to do with the light)
I don't think these would have an effect but did it anyways. Is it possible the wire on the assembly has been fried? And can that be fixed?
If anyone has had a similar problem please let me know what the outcome was. I'm up for any ideas. Thanks.
Update: there's continuity between the voltage regulator and connector pin for CHG light. Also jumpered the lamp wire to main harness and grounded with no light. Must be an issue with the assembly. Anyone ever swapped out wires in one before?
I have a John Deere 850 compact utility tractor. Not exactly sure of the year as the serial number plate was missing when I got it. From what I've read in the manual though it seems to be an earlier model as there is not a two-stage clutch.
The problem I'm having is with the CHG indicator light. When I first got it there was a parasitic draw on my battery which I tracked back to my indicator cluster. Bought a new one and replaced it. The CHG light was working fine but remained on. Did some more tracking and found my voltage regulator bad. So I replaced that. Before I was able to replace the regulator the CHG light went out. I had read that burning lamps was a common thing with these so paid no mind.
I've now replaced the regulator and the light bulb in the lamp assembly and still no CHG light. From what I have read this can cause a problem with charging as the light is the first step in the process.
Things I've tried:
Removed and cleaned fuse and fuse box connection.
Checked fuse plugs were in correctly
Cleaned battery terminals/ground
Cleaned alternator connections
Swapped old assembly with new bulb
Checked battery and alternator volts (battery voltage seems to be around the same whether engine is off or has idled and decent RPM - after idling goes up slightly. Alternator is showing very low to zero when connecting to terminal and ground and I think this has to do with the light)
I don't think these would have an effect but did it anyways. Is it possible the wire on the assembly has been fried? And can that be fixed?
If anyone has had a similar problem please let me know what the outcome was. I'm up for any ideas. Thanks.
Update: there's continuity between the voltage regulator and connector pin for CHG light. Also jumpered the lamp wire to main harness and grounded with no light. Must be an issue with the assembly. Anyone ever swapped out wires in one before?
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