12.5 LTH motor swap Electrical - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
 
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post #1 of 3 Old 03-25-2019, 08:53 PM Thread Starter
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12.5 LTH motor swap Electrical

So I blew my 12.5hp motor & swapped in a 16hp from a broadmoor parts tractor....

The motor swap went good but now I am trying to start the machine and I am not getting the green light for neutral when I key on the tractor... (pics for reference) I have 3 of these machines...

Anyway I am only suspect of it because it was not and issue before I swapped the motor, could it just be the neutral switch not working correct? This tractor has 10x as many wires than any other lawn tractor I have.......
I know the motor starts and runs, I jump the solenoid it cranks fine.... I swapped a different ignition and same result....

1st pic is the tractor, second is my running cutting tractor, 3rd pic is what I have going on.....
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post #2 of 3 Old 03-27-2019, 07:13 AM Thread Starter
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Re: 12.5 LTH motor swap Electrical

So kept tinkering around last night, and if I pull the ground wire off the solenoid and ground it with a new wire it starts and runs. Also while it is running as usual to get the pto to work, you have to be in the seat, so the pto switch is still working with the other safety switches.

So for some reason the safety switches are not working together for the solenoid/ignition/dash lights but they are still working together for the pto control. This tractor has one of those main control super special wiring harness things, so I have no idea how to mess with it or test it to see where the problem is...

I unhooked the neutral & seat switch and tried jumper wires in them to see if they were bad with no results.
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post #3 of 3 Old 03-28-2019, 08:31 PM Thread Starter
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Re: 12.5 LTH motor swap Electrical

Ill follow up my thread, I have the motor all buttoned up and went to start it, and I was getting sparks up the steering column...never saw anything like it. When I unplug the neutral switch, nothing no sparks. So one of the wires related to the neutral switch is shorting to the chassis..

This tractor has a million wires so I will keep looking for the short...
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