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-   -   M7040 No power to dash, no start (https://www.orangetractortalks.com/forums/showthread.php?t=44097)

Palominofarmer 12-02-2019 08:46 PM

M7040 No power to dash, no start
 
Ok guys, time to do that last thing men do...ask for help.

I have a 2011 M7040. A couple weeks ago the tractor would not start, had no power to dash. I charged up the battery, no help. Next day I walk out thinking I'm going to dig into this thing, starts right up like normal. Finished my chores, turned tractor off, wont start again. Ran a test light to the key switch and I'm showing power but when the key is turned to start the power doesn't transfer to any other wire. Has to be switch right? No. Ordered brand new switch from kubota, installed and the damn thing cranks right up. problem solved? Nope. I started it this morning with no problem, tried to start this evening and back to square one. All fuses look good and basically the damn thing starts whenever it wants. The light comes on with door open so I'm definitely getting power to the cab. I'm not sure where to go from here. Any help is appreciated. Thank you.

Roadworthy 12-02-2019 11:02 PM

Re: M7040 No power to dash, no start
 
Clean both battery terminals inside and out. Make sure the ground side of the battery has a good clean connection to the frame of the tractor. Start with the easy really basic stuff.

Tx Jim 12-03-2019 03:28 AM

Re: M7040 No power to dash, no start
 
Welcome to OTT
Ditto what Roadworthy stated. Have you cleaned/tightened all four(4) battery cable connections?

Dave_eng 12-03-2019 03:35 AM

Re: M7040 No power to dash, no start
 
2 Attachment(s)
I have attached the wiring diagram for the start circuit and the troubleshooting chart.

Start with Roadworthy's suggestion.

In the start circuit there is a 5 amp fuse, start relay, neutral safety switch on shuttle shift, pto safety relay, and lastly pto switch.

After cleaning the battery connections, my next step would be to jump the starter to make certain the most basic component is working.

If you do not know how to do the starter jumping safely please ask first.

Dave

leveraddict 12-03-2019 03:52 AM

Re: M7040 No power to dash, no start
 
I had a similar experience! The plug going to the starter that snaps together was still snapped together but had some back and forth play! Just enough to disconnect but still snapped together! Thats one sloppy plug on my BX! Lucky I found it just before the dealer was about to pick it up! I still had power to the dash though.

Palominofarmer 12-03-2019 07:13 AM

Re: M7040 No power to dash, no start
 
Cleaned all battery terminals, checked all ground connections. All fuses look good, I even pulled out ever single one and cleaned all contact points. I had the issue with the PTO switch before but it didn't prevent power to the dash lights. Imagine turning the key as if the battery was completely dead but the battery is fine. The couple of rare times it decided to start it started very strong with no hesitation. It started yesterday but I didn't move the tractor at all, didn't change gears or even sit in the seat. I cranked it, let it run for a bit and shut it off. Later that evening there was no power again but I have the cab light come on.

Dave_eng 12-03-2019 08:11 AM

Re: M7040 No power to dash, no start
 
Quote:

Originally Posted by Palominofarmer (Post 364927)
Cleaned all battery terminals, checked all ground connections. All fuses look good, I even pulled out ever single one and cleaned all contact points. I had the issue with the PTO switch before but it didn't prevent power to the dash lights. Imagine turning the key as if the battery was completely dead but the battery is fine. The couple of rare times it decided to start it started very strong with no hesitation. It started yesterday but I didn't move the tractor at all, didn't change gears or even sit in the seat. I cranked it, let it run for a bit and shut it off. Later that evening there was no power again but I have the cab light come on.

A few questions so I can better understand.

When the tractor is unresponsive are you saying the only thing to work is the cab dome light? The upper front and back lights wont work? The headlights wont work? Radio wont work?

Is there power in the cigarette lighten socket?

Dave

AllDodge 12-03-2019 11:11 AM

Re: M7040 No power to dash, no start
 
1 Attachment(s)
You need a voltmeter, a test light will light at lower voltages

So with key ON, there is no radio and windshield motor does not turn ON?

Palominofarmer 12-03-2019 11:40 AM

Re: M7040 No power to dash, no start
 
Quote:

Originally Posted by Dave_eng (Post 364931)
A few questions so I can better understand.

When the tractor is unresponsive are you saying the only thing to work is the cab dome light? The upper front and back lights wont work? The headlights wont work? Radio wont work?

Is there power in the cigarette lighten socket?

Dave

Power to dome light. No power to cig, radio, A/C, Dash lights, work lights front or rear, wipers, headlights, guages.

This morning I went to start it, started fine, no issues at all. Didn't move it at all or mess with anything at all. Just start, ran for a few, turned it off. Took my daughter to doc. Appt., went to start it and nothing again. When it starts, it starts without issue. When it wont start I get absolutely nothing when I turn the key. It's about as random as it gets.

AllDodge 12-03-2019 11:59 AM

Re: M7040 No power to dash, no start
 
Quote:

Originally Posted by Palominofarmer (Post 364962)
Power to dome light. No power to cig, radio, A/C, Dash lights, work lights front or rear, wipers, headlights, guages.

This morning I went to start it, started fine, no issues at all. Didn't move it at all or mess with anything at all. Just start, ran for a few, turned it off. Took my daughter to doc. Appt., went to start it and nothing again. When it starts, it starts without issue. When it wont start I get absolutely nothing when I turn the key. It's about as random as it gets.

Its wire or connection from Starter to Fuse to Key. Something in the chain has some corrosion or bad connection, my guess is corrosion.


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