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Farmall & IHC Tractors Discussion Forum
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SMTA not starting

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Ellis Kinney

06-18-2018 15:30:42




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This is one for the record books. SMTA with a 6 volt positive ground electronic ignition kit. It died on me the other day and I didn't have a chance to look at it until this afternoon. I fiddled with it and put in another ignition kit that I had from another tractor. Nothing worked. I noticed that when I cranked it the meter did not show discharge. I wondered if the meter was bad so I hit the light switch to see if it would discharge and it fired right up. The kill switch has no effect. Turn the lights off and it stops. Tomorrow I will try to figure it out. What happened. Ellis

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Kalven

06-19-2018 05:03:51




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
Sounds like you have a bad ground in the dash. Remove the dash from the post and clean surfaces,also clean the back of dash cover where it goes on the housing. You can also use star lockwashers under the long screws that hold the cover to the housing.



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Ellis Kinney

06-19-2018 07:28:25




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 Re: SMTA not starting in reply to Kalven, 06-19-2018 05:03:51  
The bolt that goes through the steering column was really rusty, I have cleaned the back of the switch case and will wire wheel the steering post. I didn't know the switch case had to be grounded. Thanks, Ellis



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John M

06-19-2018 04:52:10




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
Something definitely isnt right. Regardless, disconnect the battery until you find the problem.



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kevinj54

06-19-2018 04:26:55




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
Quoting Removed, click Modern View to see

Throwing parts at it is not the answer, could just be wiring or grounding issues.



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55 50 ron

06-18-2018 19:21:30




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
The meter (assuming you mean ammeter) should not show discharge during cranking as starter current does not go through the ammeter. Normal ignition current would be barely visible on ammeter during cranking. That leads me to believe that maybe you have been seeing a heavy discharge on ammeter during cranking which, if so, certainly points to some serious wiring errors or faults.



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Ellis Kinney

06-19-2018 04:42:05




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 Re: SMTA not starting in reply to 55 50 ron, 06-18-2018 19:21:30  
The ammeter does not show discharge when cranking, I thought it was supposed to, that is why I turned on the light switch to see if the battery discharged, and it started without pulling the starter lever. Ellis



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55 50 ron

06-18-2018 19:13:35




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
That's quite ironic as I know of another SMTA (not mine) that has the same symptoms some times. It's like a ghost story!!



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Ellis Kinney

06-19-2018 04:43:23




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 Re: SMTA not starting in reply to 55 50 ron, 06-18-2018 19:13:35  
How did he fix it?? Ellis



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mattofvinings

06-18-2018 18:25:31




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
I would get behind the "dash" and look for loose wires, rubbed-thru wires, foreign material, or other obvious signs of damage.

It would appear that somehow one of the push-pull switch's connections was compromised to + or - (so it cannot complete the circuit), and the lighting switch instead supplied the missing pathway to complete the circuit.



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Ellis Kinney

06-18-2018 19:10:10




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 Re: SMTA not starting in reply to mattofvinings, 06-18-2018 18:25:31  
Thanks, I am electrically challenged. I have a couple of extra kill switches. I'll look for worn wires and install a different switch. Ellis



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Ellis Kinney

06-18-2018 17:52:15




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
Should I buy a new light switch and kill switch??? Ellis



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kevinj54

06-18-2018 15:56:18




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 Re: SMTA not starting in reply to Ellis Kinney, 06-18-2018 15:30:42  
Find a wiring diagram & grab a volt meter, not a lot of stuff to check on one of these.



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