G4200H won't turn over

[Romo]

My G4200H won't start and I think it is an electrical issue. When I turn the key nothing happens. No glow plug light, no starter engagement, nothing. I checked the battery voltage with a multi-meter and checked voltage to the chasis ground and they are both good. There is voltage to the starter relay. If I jump across the relay terminals the engine trys to turn over. So I thought I had a bad ignition switch and replaced it, but still nothing. I read another post where someone traced the hot wire down the circuit from the battery. What I don't understand how the 12 v gets from the relay to other components. There's the hot wire terminal, ground wire terminal, and what I think is a control wire on the starter relay.

I also checked the 10 amp fuse and it is good. Not sure what it is for though. Someone also mentioned a fusible link in another post. I don't see that anywhere. I also found a yellow wire with red stripe that is not connected to anything near the starter but I don't see anything to connect it to there.

Any help anyone can give would be greatly appreciated!

 

[hodge]

What do you mean when you say "trys to turn over"? If you are jumping across the solenoid, it should turn over the same as normal.
Did you just get the tractor, or is this a new condition? Anything happen before this began?
And, welcome to OTT. Lots of folks find their way here because of an issue- hopefully you will find more than just answers. This is a friendly, good bunch of folks.

 

[Romo]

Thanks Hodge:

Sorry, I guess I should have said that it does turn over. Doesn't start though I think because the glow plugs are not getting any power. I am also afraid of frying something by jumping across the solenoid for an extended period of time?

This is an old tractor that I got a few years ago. It has happened before and I changed the 10 A fuse and that seemed to solve the problem, but not this time. The fuse is good.

I don't have a wiring diagram so I'm not sure how different components get their power.

Thanks for your help!

 

[Romo]

Hey Hodge,

The other thing I should mention is that when this problem started, I would have to turn the key switch on and off repeatedly to get the starter to engage. It was very sporadic. That's what made me think that it was the switch. Thanks

 

[cmustang]

Just a thought check your ground sometimes its overlooked and it is just as important as the positive. on the ignition switch battery and the solinoid

 

[Kytim]

Hello!!! and Glad your here. You'll like OTT.

Now, without a Schematic its a little more difficult but first, you sure you replaced the switch wiring with the same conductivity as the original switch. was it a Kubota replacement? was the orig switch shot? have you jumped batt to glow plugs yet? does that model have a visible glow plug controller or a relay?Since I don't know that tractor what other things are in the control circuit besides the clutch switch. It wont hurt the starter by jumping the solenoid, your just making yourself a manual switch with your screwdriver. just don't grind and grind and grind.

I have sporadic issues with hit and miss cranking on one of my tractors. Its a dirty connection at the + Batt terminal. I just haven't pulled it down to clean it yet. when it gives trouble, I pop the hood and try to twist it some, and away it goes!! I really should fix that. But, It acts as you describe your problem. Go ahead and clean BOTH ends of each cable. One less thing on the troubleshooting list to worry about.

Lets us know all you can, makes it easier.

 

[Romo]

I'm pretty sure there is not a relay for the glow plugs but I will look at that. I'll also try jumping the glow plugs to the battery but I was thinking that if there's a problem in the glow plug circuit it shouldn't affect the switch cranking the starter?

I bought the new switch from a Kubota dealer so I'm assuming that it's OEM, but maybe not. There's a PTO switch but not a clutch switch because it's hydrostatic. The seat switch never worked and is disconnected. I'm not even sure how it works.

This would be easier if I had a wiring diagram.......thanks!!!!

 

[Romo]

Okay, so here's what else I know so far. There is not a relay for the glow plugs. I put a jumper from the battery to the glow plugs and was able to get the tractor started by jumping the solenoid. There is a pto switch; I checked it for continuity and it was good. There is a hydrostatic clutch switch; I checked it for continuity and it was good.

I may have to either buy a wiring diagram or take it to a dealer because I just don't know what else to check. The switch is brand new and the connections are good.

 

[Scrounger]

I just had a safety switch go out on my L4800. It was mounted under dash. It is involved with safety lock out features, like seat, pto, clutch, etc. It could be possible your tractor has a similar device? For a while I just wired around it with a push button start.
Hope this helps?

 

[Romo]

Thanks Scrounger. It appears that the PTO and clutch switches are tied together. I haven't seen any other switches.

I'm going to play around with the ignition switch and see what happens.....

 

[Romo]

Problem solved. Apparently on the new starter that I bought, both wires needed to be hooked to the same terminal. I'm pretty sure that on the old starter one wire went on each terminal. Otherwise, why would there be two terminals? Anyways, it is now getting power to the key switch, so verything's good. Thanks eveyone for your input.....

Romo

 

[Kytim]

I'm glad you got it going, but I didnt see in your posts anywhere you replaced your starter. Might could have helped quicker if we had known. But, the bottom line is its going. thanks for letting us know what got ya fixed. Stick around be a part of the community.