I recently acquired a non working timecutter 4260. I replaced the solenoid, pto switch, key switch and brake modular. If i jump the brake modular the machine functions normally (minus the safety sensors). The handle safety switches were tested and function.
The previous owner had re-wired things to jump the brake solenoid (i assume). The Seat switch functions as intended (tested w voltmeter).
So one wire (light blue) looks a little Damaged (maybe melted a little near the key switch). I inspected the wore harness and dont see any shorted wires.
I was going to replace the wire harness but didnt want to keep guessing.
If the mower works by jumping the brake modular could the wire harness still
Be fried?

Thanks!

I'd look closely at the harness for any evidence of "modifying".
 
Fix what ever wires are compromised.  If the harness is too mangled up and
all your switches work, a new harness would be in order...  
 
.Make sure the brake switches, both sides, that the assembly is fully attached.
The switch may function but if the tabs that hold the switch to the frame are 
compromised, the switch won't operate properly.
 
I have the same mower and that switch, (right side), the "tab" that holds it 
broke over time.  I was able to zip tie it back to the frame and it's been operational 
for over 3 years...
 
.

Thanks for quick response. One clip is a little iffy! I will definitely secure it better.
I ran out of patience and ordered a new harness a few minutes ago!
There is some def modifications, such as a jumper wire which appears intended to
Jump the fuse.
If i paid for this machine id be worried. But if this costs me a few hundred to get going i will be very happy. 🤞🏼

Thanks for quick response. One clip is a little iffy! I will definitely secure it better.
I ran out of patience and ordered a new harness a few minutes ago!
There is some def modifications, such as a jumper wire which appears intended to
Jump the fuse.
If i paid for this machine id be worried. But if this costs me a few hundred to get going i will be very happy. 🤞🏼

Please post back how it goes...
 
 
.

I installed a new oem wire harness which apparently was the issue. The machine runs well! So i did waste $ on new brake modular and solenoid but now i have extra parts when needed.

Congrates, glad you have it fixed!
 
.

Seems like a great forum. I just joined! Looks like theres tons of useful info on here!

I just signed on to see if anyone had been dealing with this same kind of electrical issue that i have with my 74726 tinecutter....which is, I bring the brake arms in, the engine wants to die....safety stuff kicking in....   And this is not a new thing....seems like after every winter, the mower was doing the same routine with engine dies when the brake arms come in....but after running the engine for a while and continuing to futz with it (i.e., trying to fool the safety system by arms in and out quickly), it would eventually run like a top for the season.   This season, however, my routine was not working so I came to the conclusion that the brake switches were the problem, and just replaced them.   However, the first time I fired the engine up, it quit the same way it had with the old switches.   After about an hour of complaining to my neighbor about it, I tried it again, and brought the right arm in first and guess what...no engine cut out.  Brought the left arm and still running.   Did a little bit of movement....and shut it off.   Started it back up and again, it wanted to cut out when the arms came in.   But...after a little more futzing around, the engine continued to run and the mower was good to go.   Mowed for about 25 minutes and never a problem....   Any ideas on what might be really going on?

Did you search youtube for this issue? 99% sure there was video with similar issue. If no video, i know the safety switches for each arm are like $8 each on Amazon. And very easy to install (again several Youtube videos on this).
That would be a cheap first attempt!