TN75DA electrical issues

elkhurst1 · Jul 7, 2018

Hello all...

I have a TN75DA power shuttle machine that seems to have a few electrical issues.
When I start the tractor, the AC compressor pump, the AC fan motor, the four wheel drive, the radio and both windshield wipers won稚 work for 1-2 minutes, then it will all come on and work just fine. It痴 almost like a relay is starting to go bad but I can稚 tie all those items to one relay.
I致e checked all but 2 of the grounding points. Couldn稚 get to the cab roof ground and couldn稚 find the engine ground.? The others were all good.
When I was testing and shut the tractor off, 2 different times all those items (stayed on) for about 20 seconds after turning the key off as well.
All the other things seem to work ok tho....instrument cluster, lights, the ECM.
I did run my code reader and there were no codes other than a few old clutch potentiometer codes from a few years back that I never cleared off.
Anyone have any ideas?

RickB · Jul 8, 2018

I’d be suspicious of the key switch.

elkhurst1 · Jul 8, 2018

I'll order a new one and let you know how it works.
Thanks Rick

RickB · Jul 8, 2018

That’s an armchair diagnosis from 300–400 miles away. Key switches are cheap and the only component that comes to mind when considering your symptoms. Good luck Gary. The email in my profile here is good if you need it.

elkhurst1 · Jul 28, 2018

I haven't had much time to operate the machine until this week to be sure, but wanted to update my electrical issue as being fixed!
I did replace the key switch as an inexpensive first guess, but still had problems.
As I had time to investigate further, I discovered no power to 1/2 of the fuse box on the right side cab support. I removed the cover and found
4 more relays hiding just above the fuse box. I did a little more testing and discovered one was bad.
My local NAPA store carried the exact replacement. Problem solved!!!

RickB · Jul 28, 2018

Good deal.

elkhurst1 · Jul 28, 2018

Thanks RickB,
I've dropped you a couple emails from this site, and they haven't went through....not sure why???

RickB · Jul 28, 2018

Not sure either. Let me check my profile.

RickB · Jul 28, 2018

The email in my profile should be good. I sent you one through this site just now. We shall see if it goes to you.

elkhurst1 · Jul 28, 2018

Nothing! I looked through my settings as well, all looked good!

RickB · Jul 28, 2018

I’ll look in Outlook on my PC tomorrow. I might have your email address there. We will get this figured out.

elkhurst1 · Jul 28, 2018

Ok, if not and your still in good with Jessie and Henry, they'll have it.

RickB · Jul 28, 2018

elkhurst1 said:
Ok, if not and your still in good with Jessie and Henry, they'll have it.

Yeah, I text Henry several times a week. I think he is almost out of things to blame on me!

TKAdenmark · Aug 20, 2018

Hi
I am looking for a used front loader for my TN65v and I can see that you have similar tractors with loaders! Can you support me with some numbers?
Thanks

elkhurst1 · Aug 20, 2018

My TN75DA has a Quicke Q720 loader on it. It handles a 7' bucket very well and is powered by a mid-mount hyd. valve.
The TN55 has a Bush Hog 3545 loader with a 6' bucket. It's powered by wet-line valves on the back of the machine.

TKAdenmark · Aug 21, 2018

Thanks for answering! I know the brand Quicke, but newer heard about the Bush here in Denmark. Is the mounting bracket for the TN75 orginal from Quicke? And witch new Holland uses the same body? Are all TN the same, and are other models from New Holland the same, and could swap front loader!
Hi Thomas

elkhurst1 · Aug 21, 2018

I purchased the TN75 with the loader already installed. I added the loader on the TN55 which included the frame.
I don't know what TN tractors and loaders that will interchange?? That might make for a good (new) thread on this site. I'm certain there are people on here that will know.

jammer48 · Apr 6, 2019

I know this post is old but i noticed that you use a code reader. I also have the tn75 and I was wondering which code reader your using? Any help would be appreciated.