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Help. John Deere D140 wont start.

#1

J

JD_140

I have a John Deere D140 that wont start. Last fall I turned it off to answer a phone call and it would not start back up. I had the blades engaged without turning them off when I turned the ignition key off. Would not attempt to start after that. I am now trying to get it going. I can turn the key to on and jumper 12volts to the starter and start it, it then runs fine. It just wont start on its own. There is a 30amp relay that (i think its called the start relay) works. I removed it and could apply 12 volts to the coils and check the Normaly Open, and the Normaly Closed section. They go opposite with voltage applied and I can hear the relay work. The power from the battery comes down to a big relay and then that goes to the starter. I measured the coil connections on it and I dont ever see 12 volts there. The wires going to that relay's coil looks like it goes into a bundle that is going to the rear of the lawnmower and I cannot tell where.
I dont have any kind of wiring diagram and that is hindering me. Its almost like an interlock switch is causing this problem. Does anyone have any suggestions??


#2

J

JD_140

JD_140 said:
I have a John Deere D140 that wont start. Last fall I turned it off to answer a phone call and it would not start back up. I had the blades engaged without turning them off when I turned the ignition key off. Would not attempt to start after that. I am now trying to get it going. I can turn the key to on and jumper 12volts to the starter and start it, it then runs fine. It just wont start on its own. There is a 30amp relay that (i think its called the start relay) works. I removed it and could apply 12 volts to the coils and check the Normaly Open, and the Normaly Closed section. They go opposite with voltage applied and I can hear the relay work. The power from the battery comes down to a big relay and then that goes to the starter. I measured the coil connections on it and I dont ever see 12 volts there. The wires going to that relay's coil looks like it goes into a bundle that is going to the rear of the lawnmower and I cannot tell where.
I dont have any kind of wiring diagram and that is hindering me. Its almost like an interlock switch is causing this problem. Does anyone have any suggestions??
Click to expand...
Wow..... JD wants $154 for a manual !! What a rip!!


#3

StarTech

StarTech

Considering how well written the service manual is it is worth especially since it cover 11 models.

So what year is the mower? There two different wiring diagrams base on when it was made. Make that three versions.


#4

J

JD_140

StarTech said:
Considering how well written the service manual is it is worth especially since it cover 11 models.

So what year is the mower? There two different wiring diagrams base on when it was made. Make that three versions.
Click to expand...
DOM is 022217 so I assume it is a 2017 model.

After working on this mower most of the day, I got tired of trying to find the interlock switch that is causing the issue so I just bypassed it. I defeteated the reverse safety switch when I first got the mower so..... I just wired 12 volts thru that switch and use it as a start switch. Conviently it is just a momentary switch and works great.


#5

J

JD_140

StarTech said:
Considering how well written the service manual is it is worth especially since it cover 11 models.

So what year is the mower? There two different wiring diagrams base on when it was made. Make that three versions.
Click to expand...
DOM is 022217 so I assume it is a 2017 model.

After working on this mower most of the day, I got tired of trying to find the interlock switch that is causing the issue so I just bypassed it. I defeteated the reverse safety switch (RIO) when I first got the mower so..... I just wired 12 volts thru that switch and use it as a start switch. Conviently it is just a momentary switch and works great.


#6

StarTech

StarTech

1710477552053.png
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1710477674521.png


#7

J

JD_140

StarTech said:
View attachment 68053
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Click to expand...
Thank you SO MUCH!!! This is exactly what I needed!
Frankie


#8

J

JD_140

It looks like the signal to energize the starting motor goes from: S1 (Key) thru S2 (PTO switch) thru S3 (Brake switch) thru S6 (Reverse switch) then to the Starting Motor solenoid.
You don't by chance have a diagram showing where S6 and S2 are do you?

I can follow wires if need be, it's a little bit tricky to see under the chasis. I would imagine S6 is in the rear near the transmission. I would guess S2 is near the PTO cluch.

I VERY much appreciate the wiring diagram.
Thanks again,
Frankie


#9

StarTech

StarTech

These are sorta obvious. The PTO switch is the one on the dash since this an electric PTO setup. And the reverse switch will at the rear attached to the transaxle. Kinda looks like be on the right of the transaxle. Can't narrow it down beyond that as I haven't a D140 in the shop yet.
The bracket Item 30 is #1 arrow and where it is attached is #2 arrow. The switch should be activate by item 33.
1710518175701.png


#10

R

rhkraft

JD_140 said:
I have a John Deere D140 that wont start. Last fall I turned it off to answer a phone call and it would not start back up. I had the blades engaged without turning them off when I turned the ignition key off. Would not attempt to start after that. I am now trying to get it going. I can turn the key to on and jumper 12volts to the starter and start it, it then runs fine. It just wont start on its own. There is a 30amp relay that (i think its called the start relay) works. I removed it and could apply 12 volts to the coils and check the Normaly Open, and the Normaly Closed section. They go opposite with voltage applied and I can hear the relay work. The power from the battery comes down to a big relay and then that goes to the starter. I measured the coil connections on it and I dont ever see 12 volts there. The wires going to that relay's coil looks like it goes into a bundle that is going to the rear of the lawnmower and I cannot tell where.
I dont have any kind of wiring diagram and that is hindering me. Its almost like an interlock switch is causing this problem. Does anyone have any suggestions??
Click to expand...
You didn't say if you disengaged the blade. I had a repair call once and that is what it was. He lifted the blade, but not all the way. When he asked what he owed me, I said $50, but it would be free if he didn't mind being embarrassed. He said, Oh damn, what did I do???


#11

J

JD_140

rhkraft said:
You didn't say if you disengaged the blade. I had a repair call once and that is what it was. He lifted the blade, but not all the way. When he asked what he owed me, I said $50, but it would be free if he didn't mind being embarrassed. He said, Oh damn, what did I do???
Click to expand...
Thanks. I did disengage the blade.

Back in the 70s when I was 16 and just got my drivers license my mom let me take her car to the grocery store on my own, my first solo trip in the car. (1967 Dodge Dart) When I returned to my car it would not start! Dead, wouldn't even turn over. Someone saw that I was haveing trouble and came over to see what was going on. Well, he reached in and pulled the gear shift lever (automatic on the column) to park and she started right up! Boy was I embarresed ! Mom asked about my trip and I replied; Fine, it went fine.....


#12

R

rhkraft

JD_140 said:
I have a John Deere D140 that wont start. Last fall I turned it off to answer a phone call and it would not start back up. I had the blades engaged without turning them off when I turned the ignition key off. Would not attempt to start after that. I am now trying to get it going. I can turn the key to on and jumper 12volts to the starter and start it, it then runs fine. It just wont start on its own. There is a 30amp relay that (i think its called the start relay) works. I removed it and could apply 12 volts to the coils and check the Normaly Open, and the Normaly Closed section. They go opposite with voltage applied and I can hear the relay work. The power from the battery comes down to a big relay and then that goes to the starter. I measured the coil connections on it and I dont ever see 12 volts there. The wires going to that relay's coil looks like it goes into a bundle that is going to the rear of the lawnmower and I cannot tell where.
I dont have any kind of wiring diagram and that is hindering me. Its almost like an interlock switch is causing this problem. Does anyone have any suggestions??
Click to expand...


#13

R

rhkraft

JD_140 said:
Thanks. I did disengage the blade.

Back in the 70s when I was 16 and just got my drivers license my mom let me take her car to the grocery store on my own, my first solo trip in the car. (1967 Dodge Dart) When I returned to my car it would not start! Dead, wouldn't even turn over. Someone saw that I was haveing trouble and came over to see what was going on. Well, he reached in and pulled the gear shift lever (automatic on the column) to park and she started right up! Boy was I embarresed ! Mom asked about my trip and I replied; Fine, it went fine.....
Click to expand...


#14

B

bigunn

StarTech said:
View attachment 68053
View attachment 68054
View attachment 68055
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I have a GXL130 that I got from a friend and the paint was really bad so I took it apart to paint and the reverse switch the wires were just cut and it would start right up which I don't understand, where would a guy get the John Deere Manuel I assume John Deere.


#15

A

ashingde

bigunn said:
I have a GXL130 that I got from a friend and the paint was really bad so I took it apart to paint and the reverse switch the wires were just cut and it would start right up which I don't understand, where would a guy get the John Deere Manuel I assume John Deere.
Click to expand...
There are plenty of sites on-line that are willing to sell you the manual, and probably cheaper than JD, although that would be an option. The D140 manual, and many others, can be had here:
www.lawntractorco.com

Repair & Service Manual For John Deere Mower – Choose Your Mower (Instant Access)

Choose your repair manual for your specific John Deere mower from the drop down boxes above. You will receive a fully downloadable PDF version of the manual. The specific John Deere mower manual gives you access to the OEM factory service manual with manufacturer specifications, diagrams...
www.lawntractorco.com www.lawntractorco.com

I just ordered one for my X739 for $20, to compare it with the JD version, which was >$150.


#16

B

bigunn

StarTech said:
Considering how well written the service manual is it is worth especially since it cover 11 models.

So what year is the mower? There two different wiring diagrams base on when it was made. Make that three versions.
Click to expand...
Would you have a link as to where you can buy these Manuels have check John Deere I have a L130


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