Man am I frustrated...A whole lot of nothing!!

[fishnwiz]

Bought a real nice 4212 to resale...tractor would start sometimes. Today put a spark indicator on it....NO spark. Pulled black wire and started right up. Replaced black wire and motor stopped. Now I get back on it and mess with the key a little and switch is feeling messed up. Pulled old switch replaced with working switch...NOTHING.meaning NO turnover of the engine. I do hear the breaker click on and then off again under the seat. Jumped PTO and neutral safety switch and seat switch...NOTHING....tried jumping with new battery...NOTHING....replaced breaker and selonoid....NOTHING...still clicking of breaker. Checked all grounds..cleaned surfaces...NOTHING. Replaced complete wire harness from selonoid back to starter...NOTHING! Jumped starter...turns over.

Any ideas on what I am missing? everything has been jumped and replaced and still no turnover of engine. I even put the old starter switch back in and still single click of breaker and NOTHING.

[BLT]

You only have four wires that affect engine , 4 ga black starter wire, black ground wire for ignition, red wire for batt chg and white? for headights. Disconnect all four and I'll bet circuit breaker still clicks away. That tells ne that you have a bare wire grounding downsde of the breaker. Pull the non powered wire off the breaker and see if the clicking stops. If it does, you have to chase that down for a rubbing wire.

[Ronald Hribar]

Does it have a round safety module ?

Jolson I think the seat has two switches in it

One makes ground when not in seat

The other completes the start circuit

This was the case on my sun runner which I believe is based on the 4212

[fishnwiz]

I will have to check for second switch....What would be the odds of a bare wire on both wire harnesses?

[fishnwiz]

Only has one switch in center of the seat...no other switch hooked to the seat in any way.

[GrincheyOne]

Mark,

Easiest way to eliminate the "nanny" switches, is to remove the yellow and green connection to the solenoid, and run a wire from that terminal to ground. That eliminates the switches and the I/C module (to the rear of the solenoid. Overall the wiring on the 4200s is "spooky" at best.{}

Wayne

[fishnwiz]

Thanks Wayne...will give that a shot.

[fishnwiz]

Would IC module failure give me same symtoms

[fishnwiz]

No luck on elimination of nanny switches...still hear breaker click....then reset.

[BLT]

Then the wire between the CB and key switch is bared open causing CB to pop.You should be able to feel a warm wire between the two spots.

[ardisam]

With these model tractors, I have notice that a black wire from the solenoid to the frame of the tractor. Maybe this will help.

[fishnwiz]

The selonoid I have does have a black wire to ground.

After changing out the complete wire harness and everything in between I am still at a loss .Same symptoms. Its possible that one of the components I replaced is also bad but they were all removed from a running 4212 tractors:(

[Brettw]

Could you have a bad breaker? Have you tried to bypass it just to test?

[fishnwiz]

Have switched out breaker with another that I know is good.

[Willy]

Hey Mark

Why don't you start at the starter, you know it works and

test back to the switch?

Hopping from one thing to another will drive you buggy..

[fishnwiz]

It looks like I have a few different type 5 post switches none of which are marked at all with part numbers...3 brand new ones and none worked on this setup. Also had a few others that came off of running 4212's.After having a small BS session with BLT last night...the mutual feeling is that the problem is most likely at the switch.

You are right Willy...all of this jumping around with replacing everything narrows it down to nothing.

[fishnwiz]

Have switched out breaker with another that I know is good.

[fishnwiz]

KEY SWITCH! Runs great I did not know there were 5 different kind of 5 post switches...go figure!