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How do I check an ignition switch (691641) to see if it is bad

It's a 6 pin switch for a garden tractor and there appears to be a burn line from the unmarked contact to the contact stamped G. Other contacts are marked S, M, B, G, L , and this group goes to wiring harness. Unmarked contact has lone red wire to it. Mower blows 20A fuse when starting if mower has to crank for more then 10 seconds. Fuse also blows when I turn the mower off with the key. I have a new starter and have not been able to locate a bare wire yet.

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  • Samuel Charles Spriggs May 11, 2010

    The unmarked contact is the hot wire (+), the G contact is the ground (-). There is probably a short which is causing the burn mark. The switch is not causing the fuse to blow. The switch is probably okay, because the fuse is blowing before the switch gets damaged.

    If the mower starts within the 10 seconds, and then runs okay, the problem could be in the starter solenoid/relay -- it could have a (resistive) short which is pulling too much current.

    However, this would not account for the fuse blowing when the mower is turned off. So, we need more info. What does the fuse connect to?



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Posted on Sep 08, 2017


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SOURCE: Repair Parts Manual / Book Service Garden Tractor

C I am thanking a lot for dealing with my matter and very much I am counting for your help in getting the list of the spare parts with catalogue numbers of my model of the garden small tractor.
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Posted on Nov 25, 2008

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Ist of all is 10 amp the proper size?
2nd if you bypass and whatever you are replacing the fuse with, is it warm, or hot to the touch?
If it is you have a direct short in you have a direct short in the electrical system. Check for bare wires,wires touching the motor or chassis that don't have a connector.
Hope this is a FixYa

Posted on Mar 20, 2009

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SOURCE: My riding mower blows fuses once you turn the key.

Sounds like you are on the right path, maybe some wires on the ignition were replaced backward, and you are sending +12v directly to ground? Does it blow right away?

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SOURCE: My mower keeps blowing the 20 amp fuse that is on

ck the wires going to yhe head lites theay could be frad and shorting out

Posted on Oct 01, 2009

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SOURCE: 24 hp. garden tractor goes in reverse but not forward


Posted on Oct 30, 2009

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