G1900 Help - Won't Start - Did all that I have read to troubleshoot without success

[wadeatl]

I have been using this site for years .. thanks in advance for the indirect advice already!

I have a G1900 that has been great for many years. All of a sudden one day it would no longer start. I've been all over the web reading posts of what could be the issue. The first thing I did was test the safety switches. I am only aware of of them, one on the seat, one on the brake and one on the PTO for the mower deck. All checked out fine. Next I checked the connection to the ground and battery and that is good. I then took the starter into Advance Auto and they tested on their tester and it powered right up and passed the test. Next I added the Black Box and thought that would the trick. Well it didn't and I am now at a lose of where to look next. Please let me know if there is anything I am missing.

I Forgot to mention I changed the ignition switch recently and would think its still good.

Thanks in advance!

 

[Billrog]

Is the oil low ? Low oil shut down.

 

[davesl708]

Recheck the wires on the switch. Make sure they are wired to the right terminals and are tight.
Check fuses and all ground wires.

 

[Huskerfan]

Had the same problem on mine in cold weather many times. It works fine in warm weather. Couldn't isolate the reason so I ended up directly wiring in a separate push button starter switch to the starter that bypasses the ignition switch. The key switch is still used to operate glow plugs, gauges and to shut off the tractor. This Inexpensive solution is available from most any auto parts store. Installation is easy.

 

[adventure bob]

Describe "wont start" Key turns and ...? Silence? Clicking?

 

[kbuicker]

Is the engine locked up? Do you get any power at all? lights? Any humming?

 

[wadeatl]

Is the oil low ? Low oil shut down.

I just checked the oil and there was plenty of oil.

 

[wadeatl]

Recheck the wires on the switch. Make sure they are wired to the right terminals and are tight.
Check fuses and all ground wires.

I should have mentioned .. I checked all of the fuses in the screen area under the steering wheel and they all are good.

 

[wadeatl]

Had the same problem on mine in cold weather many times. It works fine in warm weather. Couldn't isolate the reason so I ended up directly wiring in a separate push button starter switch to the starter that bypasses the ignition switch. The key switch is still used to operate glow plugs, gauges and to shut off the tractor. This Inexpensive solution is available from most any auto parts store. Installation is easy.

It did not run start this summer either .. I am just getting around to working on it now... I do not think it is temperature related

 

[wadeatl]

Describe "wont start" Key turns and ...? Silence? Clicking?

When I turn the key it is not silent. Not sure I can describe the sound but clicking/humming sounds right. The Glow Plugs does cycle.

 

[wadeatl]

Is the engine locked up? Do you get any power at all? lights? Any humming?

I do not believe it is locked up. I do get humming .. not sure on the lights.

 

[wadeatl]

OK .. I was able to jump the terminal the solenoid and the diesel fired right up. I guess the next step is to see about finding a wiring diagram and getting out the volt meter. Also the dash worked and headlights worked. It's gotta be something between the ignition switch to back box and black box back to the starter. I will see what I can find out tomorrow.

Thanks for all the help so far!

 

[adventure bob]

Our G1900 had a similar problem and I followed your route to no avail. finally after a calming breath and a beer I tore the dash apart and found a rubbed wire down where they go through the "firewall" towards the engine bay.

 

[davesl708]

OK .. I was able to jump the terminal the solenoid and the diesel fired right up. I guess the next step is to see about finding a wiring diagram and getting out the volt meter. Also the dash worked and headlights worked. It's gotta be something between the ignition switch to back box and black box back to the starter. I will see what I can find out tomorrow.

Thanks for all the help so far!

You may be building up resistance in all the safety switches and wires. Had this problem with my BX2200. There is a JD relay that plugs right in and gives you a full 12 volts to the starter solenoid.
There is a thread on here with the part number for the relay.

 

[pap71]

My G1900 did the same thing and it was the switch. I replaced it and two years later it did the same thing again. I just put a starter button on it and it has been working for four years now. Much cheaper than a new switch from Kubota.

 

[wadeatl]

Well the G1900 is up and running. It seemed that the plug on the ignition switch was either not seated well or the wires were not connecting. I removed the plug to use a multi-meter to make sure the switch was working properly (it was) and when I plugged it back in it started right up. After I had it running .. I went to start it again and it was dead .. no clicking no glow-plugs and was puzzled. I pulled the fuses (again) and checked them all with the multi-meter and they all checked good .. put them all back in and it started right up again. So net-net was a bad connection in the ignition plug and a fuse that was not making good contact.

Thanks again for all the tips!