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Garden Tractors Discussion Forum

Re: 312 wheel horse saftey switch bypass

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joe csuti

05-17-2013 04:35:19

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What you need is help with tractor in the form of someone who can read/understand electrical drawings & an understanding of electrical circuits/wiring and also an understanding how to use an ohmmeter & interpet what meter is telling you relative to where/what you're checking in wiring,this is a HANDS ON JOB.

IF you look at wiring diag you'll see that tan,white & orange wire are NOT associated with ign kill circuit for eng,the tan wire is for oil float sw,white wire is DC output from alt on eng & orange wire is common pos(+)feed to idiot lite bar,IF you also look at legend for sw contacts you'll see that in stop position all of the above wires are connected together when ign sw in off/stop position,depending on where you're referencing to(neg/chassis ground or pos+ cable) you will get an ohmmeter reading due to a series loop/backfeed thru lamps,coils & sw's in electrical system when checking these wires & you'll end up chaseing a ghost,your concern is the blue/dk blue wire that runs between ign sw(M terminal)and ign coil on eng & any wire(s)that connect to this wire between ign sw & eng,it is also apparent that for whatever reason wiring to safety sw's was cut/spliced to bypass orignal problem didn't work & original problem is still present in that ign kill lead is still being grounded when cranking eng & you are loseing spark to plug.

IF you insist on useing tractor without checking & bypassing safety sw's & associated wiring then run a NEW wire between wiring harness connector at eng & ign sw,disconnect existing blue wire at each end & connect new wire at harness connector/ign sw where blue wire connected.

ALSO NOTE-I WILL NOT be held responsible if you choose to bypass safety sw's & go it alone to any damage caused to ohmmeter,burned out ign coil,burned up wiring harness or personal injury.

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05-17-2013 10:04:27

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 Re: 312 wheel horse saftey switch bypass in reply to joe csuti, 05-17-2013 04:35:19  
It works. Thank you Joe for the patience with a poor student. I can appreciate your concern for bypassing the saftey switches. Again, this site is the greatest!

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