TC 30 Will not turn over / Start

[JD500]

Ok, Two weeks ago I went out to start the wifes 2006 Tc 30. Nothing. This little guy always starts and runs fine.
No glow plug light.
No fuel solenoid click.
No turn over.

I jumped the seat safety.
The brake safety.
Then the two safety on transmission( pto and neutral)
Nothing

So I looked on here. Some people had the same problem. So I replaced the computer.
Nothing, same thing.
Some said the safety relay or ignition switch.
Replaced them, Nothing.

If I run a live wire from the battery to the fuel solenoid. It will open.
If I jump the safety relay then turn the key. It will start up.

A new relay in. it will not start. But jump it, it starts up. ?????

Today I did notice the pto light is on. With the two switches on the transmission. Plugged in, jumped or unplugged. The light stays on.
Which may explain not turning over.
But what is powering the light ??

Still no glow plug light.
No power to fuel solenoid.
Will not turn over.

14.68 volts running
12.60 volts sitting
Cables clean


So what do I look at now ??
Thanks, Lets here from you !

 

[Diggin It]

You're all over the place ... hard to follow what you have or haven't done and why. Swapping parts without identifying if they're bad can get unnecessarily expensive.

Battery is good and the engine will start and run if jumped, but not by the key switch?

Trying to weed through the other information, it almost sounds like some kind of wire or connector fault. What's your mouse population like? They love some wire insulation and a chewed wire could fail or short to ground leading to things like indicators being on when they shouldn't be.

 

[JD500]

I am waiting for the service manual. Hoping it has a detailed wiring diagram to chase wires. I did not see anything obvious looking at the wire loom. Just didn't want to cut all the tape off now. A wire could have melted in the harness. Which would short out like your saying. Just wanted to see what you guys think.

 

[Roadworthy]

You can make the tractor run by manually completing circuits. For some reason the switch is not completing these circuits. I'd start by checking fuses and fusible links then cleaning the battery terminals really well. After that I'd probably pull the switch to be sure all positions work correctly. You may also have a defective relay or bad contact on one or more connectors. Sometimes unplugging and reconnecting them is enough to clear a problem. Troubleshooting is rarely quick and easy though when the problem is finally found it may have been obvious all along.

 

[Ford850]

Did you read the thread at the top of this section? https://www.tractorbynet.com/forums/new-holland-owning-operating/124642-tc33d-wont-start-3.html
There are many good tips in there covering several issues. But one common issue for many brands is bad battery cables even though they look like brand new.

 

[thclimer]

Ok, Two weeks ago I went out to start the wifes 2006 Tc 30. Nothing. This little guy always starts and runs fine.

.......

Today I did notice the pto light is on. With the two switches on the transmission. Plugged in, jumped or unplugged. The light stays on.
Which may explain not turning over.
But what is powering the light ??

Still no glow plug light.
No power to fuel solenoid.
Will not turn over.


........


So what do I look at now ??
Thanks, Lets here from you !

If your PTO light is on, doesn't that mean your PTO switch thinks the PTO is engaged? My TC33D will not allow it to start if my PTO is engaged.

Your manual should have a copy of the electrical schematic.

I've attached the electrical schematic for the TC series deluxe tractors as I would think the safety switches may be similar to your TC30, it may help you a little.

 

[DieselMonk]

yep. the tractor wont start with the PTO engaged. This safety switch you forgot to check. Just put the PTO lever in and out of gear a dozen times with a little force.

 

[showcattle]

Check in the left rear fender well. There is a wiring harness plug there, that if it gets disconnected, the pto light comes on, and allows a "no start" situation.

 

[racer86y]

If your PTO light is on, doesn't that mean your PTO switch thinks the PTO is engaged? My TC33D will not allow it to start if my PTO is engaged.

Your manual should have a copy of the electrical schematic.

I've attached the electrical schematic for the TC series deluxe tractors as I would think the safety switches may be similar to your TC30, it may help you a little.

I am having same issue right now.I ordered a air control sensor and hope it makes thhe fuel solenoid open up

 

[racer86y]

Ok, Two weeks ago I went out to start the wifes 2006 Tc 30. Nothing. This little guy always starts and runs fine.
No glow plug light.
No fuel solenoid click.
No turn over.

I jumped the seat safety.
The brake safety.
Then the two safety on transmission( pto and neutral)
Nothing

So I looked on here. Some people had the same problem. So I replaced the computer.
Nothing, same thing.
Some said the safety relay or ignition switch.
Replaced them, Nothing.

If I run a live wire from the battery to the fuel solenoid. It will open.
If I jump the safety relay then turn the key. It will start up.

A new relay in. it will not start. But jump it, it starts up. ?????

Today I did notice the pto light is on. With the two switches on the transmission. Plugged in, jumped or unplugged. The light stays on.
Which may explain not turning over.
But what is powering the light ??

Still no glow plug light.
No power to fuel solenoid.
Will not turn over.

14.68 volts running
12.60 volts sitting
Cables clean


So what do I look at now ??
Thanks, Lets here from you !

I am having same issue.I ordered air flow sensor and hopefully it fixes it.