Instrument panel ground on CTL80/Takeuchi TL150

I have a Gehl CTL80. all Of a sudden the instrument cluster quit working. Everything run fine just not gauges. I think it is a grounding issue. Does anyone know where the ground location for the instrument cluster is located?
the reason , I think it is a ground problem , is the horn will not honk when the button is pushed. the horn circuit is hot and when the horn button is pushed it connect to ground and would honk. the hot side is ok. I don't really care about the horn, but suspect the horn uses the same ground as the instrument panel.
There is some disassembly to get to the electrical connections, so I was hopefull the grounding point may be easy to get at.
I would appreciate any ideas or thoughts.
thanks

By letter "g" and above "2-11"
On my TL150 machines, I have more of an issue with relay solder failure. Never had a ground issue.

Thanks for the harness diagram, I do have that, unfortunately, it does not show the grounding locations.
I was hoping to find that without having to take up the floor pan and covers.
I think it is the ground connection because the horn also stopped working and it has power to the switch.
Thanks again for your reply.

But "g" is the primary harness ground. You will have to tip the cab up, though.

Sorry, I totally missed what you were saying in your original answer. Many thanks, I check that out first.
I’ll post back what I find.
Thanks again.

You keep losing me with "the horn has power to the switch". Clarify, because, the horn button has no power. It completes a ground to the relay above your toes.
As for the horn relay, it powers from the same fuse as the interior"dome" lamp. Does your dome lamp work?

Hello,
The horn was working and it quit at the same time the instrument panel quit. I could be wrong, but it looks like one side of the horn switch has power. The same circuit as the horn relay. When the horn but is depressed. It completes the circuit to ground. This activated the horn relay( located in the relay panel) which activated the horn.
My machine is a 2007 model and does not have a dome light, but all my fuses are good.
The horn circuit has nothing to do with the instrument cluster circuit, but since they are in the same control stand, my theory is the instrument cluster and horn use the same ground.
Just wondering, can the instrument cluster be repaired? Do you know someone that does this?
I think it has to be a loose connection somewhere. The machine starts and run like normal, just no gauges or indicator light work.
I really appreciate your help.
Thanks again

Hello again,
Here is the update. As you suspected, it is not the ground.
The Horn relay was sticking open and would not let the horn activate when the button was pushed. I tapped on the relay and the horn started working. It must have quit working as a coincidence when the Instrument cluster quit.
one thing I still need to check out. The Horn relay, Arm float relay, and Heater lamp relay are in the same relay. The float arm works, the horn now works, I think pre heat is working, but the heater lamp relay does feed into the instrument cluster. It would turn on the light in the panel. Do you think, if the heater Lamp relay was not working, it could keep the whole cluster from working?
I did look at the inside of the instrument cluster, but did not see anything that looked bad.
I have not been able to trace any of the wires at the back of the instrument panel. Still looking to see if anyone has a "pin-out" for the plugs that go into the circuit board.
Any additional ideas would really be appreciated. I hate to run the machine very much without the indicator lights.

Well, no schematic with me today, but, that relay (the triple) is my number one electrical issue on these.

Take it apart. Closely inspect for cold solder joints on the green circuit board. The larger the pin, the more likely you'll see a cold solder joints. A hot soldering iron and a touch more solder on an suspected cold joint. Doesn't seem to occur on any of the other relays, just the triples. I can't recall if there are 2 or 3 in that panel. The ones with a phillip screw don't come apart, just the triples.

There are two “triple” relays in the panel. I will take apart and check.
I hope that would be the problem, but don’t know if that would keep the Whole instrument panel from working. I’ll update
Thanks again

Well, Problem solved. I did find a cold solder on one spot on the horn relay, so that is fixed. I decided to just start disassembling the right side lever stand. When I removed the bottom panel, I found a six pin connector that had come loose. that was my instrument problem. all is working now. I suspect, someone before me had been working in there and did not get the connector fully seated.
Another question, What is the function of the "safety relay". This is the relay mounted on the inside of the bottom panel, below the fuse box.
Thanks again for all of your help.


Thanks again for all your help.