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Reload this Page 1872 IGN switch, starter circuit question
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Old 03-28-2016, 10:40 AM
samckitt samckitt is offline
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Default 1872 IGN switch, starter circuit question
When I got this tractor, there had been a push button added to engage the starter solenoid, assuming because the keyed switch had gone bad. When I got it home it wouldn't start. I had to add a new push button switch, the old one smelled of fried electrical. Now the new push button switch has gone bad. I want to replace the keyed IGN switch, but not if I keep burning them up. What should I look for? Possibly the solenoid wrong size I pulling too many amps & burning up the switch? Any other thoughts to check?
Thanks
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Old 03-28-2016, 10:51 AM
R Bedell R Bedell is offline
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Since you give us NO information on this MC Push Button switch, nor how it is wired, my suggestion to you is that to put the Wiring back to original as when it rolled out of the factory. Get the correct Ignition Switch and Starter Solenoid and wire it up per the diagram.

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Old 03-28-2016, 11:05 AM
J-Mech J-Mech is offline
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Quote:
Originally Posted by samckitt View Post
Possibly the solenoid wrong size I pulling too many amps & burning up the switch? Any other thoughts to check?
Thanks
Solenoids don't pull diddly squat for amps. You should be able to tell just by looking if it's the right one. Like Roland said, replace the ignition switch. Check the wiring for shorts. Easy peezy.
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Old 03-28-2016, 11:22 AM
samckitt samckitt is offline
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Was just thinking something isnt right if it has burnt up the keyed IGN switch, & at least two push button switches that I know of.
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Old 03-28-2016, 12:04 PM
R Bedell R Bedell is offline
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something isn't right if it has burnt up the keyed IGN switch
Repair and/or replace any bad wiring and/or connectors. If splicing, use 14GA wire.
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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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Old 03-29-2016, 11:33 AM
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FrankF3 FrankF3 is offline
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Just curious, The fuse on the pedestal is supposed to protect the wiring harness against over current and should be a 20 Amp, slow blow fuse. Is that what is installed?
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Old 04-17-2016, 09:51 AM
samckitt samckitt is offline
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well I figured out why the push button keeps blowing, it was wired up between the two big posts of the solenoid. So all power being pulled by the starter was going through the push button switch. It wasnt wired to activate the magnetic coil. So I thought the solenoid was bad. Nope, checked it, its good. Then turned to the original switch, thinking it was bad, so I got a new one. It didnt work either. I'm not getting 12v to the coil circuit of the solenoid from the starter switch. short in the wire somewhere I guess, so I gotta trace through. Ugh.
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Old 04-17-2016, 11:01 AM
R Bedell R Bedell is offline
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Then turned to the original switch, thinking it was bad, so I got a new one. It didn't work either.
The start circuit on the 1872 is..... Battery..>> Ignition Switch..>> PTO Switch..>> Brake Pedal Switch..>> Starter Solenoid.

You could have a defective component or a wiring issue in that circuit.

It is similar to this...

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Old 04-17-2016, 11:23 AM
samckitt samckitt is offline
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Thanks Roland.
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Old 04-17-2016, 11:38 AM
samckitt samckitt is offline
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Found the culprit. The arm that activates the neutral switch is broke. I have a parts tractor with one on it, but how do I get it off.
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