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  #1  
Old 05-20-2014, 01:03 PM
TRBOJET TRBOJET is offline
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Default Cub Cadet 1641 Electrical Issue
I am rebuilding a CC 1641. It's all back together. I was having issues with the electrical blade clutch engaging. I figured it to be a ground issue. In the process while jumping a wire from the rear of the ignition switch, I noticed that every time I started the tractor I was frying the jumper wire. Everything is normal after the starter is disengaged. Why am I frying the wire just when the starter is engaged? I have a good ground to the starter. Bad relay? Starter? Any help would be appreciated. Thanks.
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Old 05-20-2014, 01:22 PM
J-Mech J-Mech is offline
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Well....... why are you jumping a wire? What wire are you jumping? I would say you are frying it, because it's not supposed to be there. Don't do that anymore.
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Old 05-20-2014, 01:34 PM
TRBOJET TRBOJET is offline
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I'm jumping the ground wire (Green) from the back of the ignition switch to ground.
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Old 05-20-2014, 01:43 PM
R Bedell R Bedell is offline
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Quote:
electrical blade clutch
What is that...????
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Old 05-20-2014, 01:49 PM
TRBOJET TRBOJET is offline
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I guess you would call it the PTO
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Old 05-20-2014, 01:53 PM
TRBOJET TRBOJET is offline
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unless I ground that one tab (that the schematic shows as ground) the lights and the PTO do not work. very frustrating.
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Old 05-20-2014, 02:11 PM
J-Mech J-Mech is offline
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Ok, the lights and PTO do not ground through the switch. The switch case is grounded, and so are the lights and PTO. But not through the switch.

This terminal is the grounded one. The lights, PTO and motor will all work and run whether this terminal is connected or not. Only thing is, you won't be able to shut the tractor down with the key. (Still may work though as the switch body itself is also grounded. This wire is a "just in case".) Find and repair your bad ground, and check the key switch for a short to ground through the start terminal.

IMG_20140520_120535.jpg
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Old 05-20-2014, 02:20 PM
TRBOJET TRBOJET is offline
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Ok. Very good info. It is a new key switch and I did check everything. I do have one question. Should that one tab which you have marked go directly to ground? When I got this tractor, there were two green wires that were attached to your circled tab in your photo. I'm starting to think that those two wires go directly to ground.

I went out and pulled the two green wires off of your circled tab. I then grounded the two wires to the frame. There is no wire from your circled tab. I started the tractor, the lights work, the pto runs and when I turned the key off the tractor stopped.
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Old 05-20-2014, 02:30 PM
J-Mech J-Mech is offline
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One of the green wires makes a run over to the R.H. side of the motor, where IIRC it isn't used. The other, again IIRC, goes over to the L.H. side of the battery tray where it grounds to a condensor of some sort, then runs up to the lights. Not sure about the condensor part, I don't have one here to look at that is complete. But yes, the green wires run to a ground. I am pretty sure it's over on the L.H. side of the battery though.
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Old 05-20-2014, 02:34 PM
TRBOJET TRBOJET is offline
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fyi, the ignition switch is not grounded to the frame. It is being held in place on the tractor in a plastic mount. There is no metal to metal contact.
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