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Garden Tractors Discussion Forum

Re: wheel horse 312 starting

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joe csuti

05-03-2013 13:52:47
151.198.126.101



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You have to reconnect blue wire to stop eng,when you removed blue wire from connector all you did was disconnect ign module on eng from stop contacts in ign sw proveing there is a problem in ign sw/wiring.

If blue wire is easy to remove from connector remove wire again,DO NOT start eng,disconnect pos(+) cable from battery(this will prevent starter from cranking eng while checking ign sw)connect one lead of ohmmeter to battery neg(-) connect other meter lead to blue wire in opposite side of connector where you removed blue wire,turn ign sw to all position & watch ohmmeter,if you get a 0 ohm reading in ANY position except stop position then something internal broken in ign sw,this is assumeing sw is orig oem sw,If you get a 0 ohm reading on stop contact(M)when sw in start position,then take mod/sn of tractor to local toro dealer & have him look up correct pn sw and buy/have him order for you.

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Betsey

05-06-2013 11:33:37
69.89.106.207



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 Re: wheel horse 312 starting in reply to joe csuti, 05-03-2013 13:52:47  
I got a new switch from a mower shop and I still have the no start while cranking issue. They looked it up by model number so I can only assume it is the right part.



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joe csuti

05-06-2013 18:31:49
151.198.127.2



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 Re: wheel horse 312 starting in reply to Betsey, 05-06-2013 11:33:37  
If you still have same problem with new ign sw it indicates that in spite of cutup/spliced wires ign kill side of safety sw's is still connected to kill circuit to eng and that possible orig problem still present.You have two choices.

1-get into a full blown troubleshooting job of checking operation of safety sw's & associated wiring for shorts/shorts to chassis.As a quickie check BEFORE disconnecting any sw's/wiring,check seat sw operation with an ohmmeter(connector for sw disconnected from sw),if there is a jumper in seat sw connector remove same,seat sw is start of ign kill circuit for safety sw's,a bad seat sw or jumper in connector for same will send signal to eng nobody sitting on seat,kill eng ign when cranking eng,seat sw functions same way as ign sw in stop/off position,completeing ground to ign kill circuit.

2-if you don't want to be bothered with troubleshooting/flustration of same & can live without safety sw's,then remove blue wire from connector where you did before as it is apparent that connector is after/downstream of safety sw connection into ign kill circuit.Disconnect tractor wiring harness where it connects to eng wiring,with ohmmeter go between blue wire in connector at eng end of tractor wiring harness connector & blue wire you removed from connector & mateing blue wire still in connector,on one of these wires you will get a 0 ohm reading,splice/butt splice a new wire to wire you got 0 ohm reading on long enough to get to ign sw,reconnect tractor wiring harness to eng,at ign sw locate blue wire in plug connector for sw & confirm that it goes to magneto(M)terminal at sw,if it does seperate blue wire from rest of wires in plug as far back as possible & cut,take end of new wire you added to ign module lead & slice/butt splice to short blue wire tail in ign sw connector,this now bypasses all safety sw's in ign kill circuit.

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Betsey

05-15-2013 14:57:17
69.89.106.207



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 Re: wheel horse 312 starting in reply to joe csuti, 05-06-2013 18:31:49  
Joe, I chose optin #2 (no trouble shooting) When searching for the wire with the 0 ohm reading I get conflicting results. With the switch off the blue wire has 0 ohms with the tan, white, and orange wires. With the switch in the on position only the tan wire has 0 ohms. Does this make any sense? Sorry I haven't had a chance to get at it sooner but other matters were needing my attention. Thanks for your help.

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joe csuti

05-06-2013 18:47:11
151.198.127.2



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 Re: wheel horse 312 starting in reply to joe csuti, 05-06-2013 18:31:49  
As a followup/test for new ign module wire connection,start eng,then short end of wire at ign sw end to shell of ign sw/any clean sheetmetal/screw heads or eng block till eng stops,this will confirm kill circuit works before connecting wire to ign sw.



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