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Wiring a new coil

E

eremoao

Member
My coil went bad in a Case 1835C sikdloader so I'm going to replace it. Previous owner must have changed to distributor over to electronic ignition because the is no points or condenser. But they did not replace the coil, they left the coil in there with the external resistor. Now I want to wire in a coil and get rid of the external resistor. Can someone talk me into where and what I need to connect to the new coil? A nice diagram would help. If you need more information just let me know and I'll provide to the best of my ability.
 
How do you know the coil is bad and not the EI? That being said, if the coil really IS bad, why just not replace it with a similar one and avoid rewiring?
 
Took coil out, took to parts store, it tested bad. The wiring is so messed up and needs to be redone. The service manual says to use a coil without the ballast resistor, the guys at the parts store said the same thing. I'm not the best when it comes to this stuff that's why I'm looking for help. It seems to be a definite upgrade as I will be removing quite a few wires along with the resistor, less parts and wiring to worry about. It seems pretty straight forward, but just want input on how it is done. Need to get it running as I already missed plowing the 5" we got Sat and Sun, now we are to get more Thurs and Fri. Hope to find the help I need, I trust the guys on this site as the have never let me down before.
 
So what I think I need to do is connect the positive from the ing switch to the positive on the new coil. Then from the ing module connect one wire to negative side of coil and the other wire from the ing module to a ground. Does that sound right?
 
(quoted from post at 22:31:17 12/13/16) So what I think I need to do is connect the positive from the ing switch to the positive on the new coil. Then from the ing module connect one wire to negative side of coil and the other wire from the ing module to a ground. Does that sound right?
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I am NOT familiar with that unit, what engine does it use?

A photo of the EI unit would also be helpful.

If it HAS been converted to EI, the common make is Pertronix, we HAVE to identify what you have, 'cause wrong wiring will "let the smoke out" in a hurry.
 
All the elec switch does is replace the points which close and open with a solid state device that conducts then opens. Assuming you're at NEG ground the Ign switch output (hot when ON) wires to the coils + and the coils - wires to the elec switch INPUT which then leads to - Ground on its OUTPUT. If you previously had a 6 volt coil and a voltage dropping (12 to 6) balls and now use a 12 volt coil you toss the ballast and wire per the above. The elec switch has to match your ground (Pos or Neg).

John T
 

I have pertronics on a tractor and a fork lift. I suspected a problem with one and called pertronics. They were super good, and emailed me step by step instructions on testing the unit.

Your idea of "removing quite a few wires along with the resistor, less parts and wiring to worry about", despite "I'm not the best when it comes to this stuff" sounds to me like a recipe for disaster. Just look at the wires one at a time, see where they go, and you will probably find that they are all needed and are orderly. Do you have any zip ties?
 
NO The ignition module grounds through the base of module to distributor mounting surface.

Resistor was likely there originally to provide hotter spark to start but that is another discussion.

I suggest you call Pertronix tech line 909-547-9058 for wiring instructions. Also would be helpful get someone to help who understands the circuits and their operating theory.
 

I find it interesting that eremoao hasn't replied to my post asking if he can identify it as a Pertronix, or post a photo, yet there's a slew of replies telling him how to connect it as a Pertronix.

While it seems likely that it IS a Pertronix, preceding without knowing for sure will let a lot of expensive smoke out of the EI.

For that matter, if it IS a Pertronix and the coil has failed, there's a pretty good chance the smoke has already been let out of the module!
 
NO problem with you, I just thought a couple of the other guys were "jumping the gun" a bit, when we aren't sure WHAT EI you have, yet!
 
(quoted from post at 13:47:13 12/14/16) NO problem with you, I just thought a couple of the other guys were "jumping the gun" a bit, when we aren't sure WHAT EI you have, yet!
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xactly, Bob! You know, "everyone else surely must have exactly what I have". Further more, I know of no Pertronix module with a brown wire.
 
(quoted from post at 10:47:13 12/14/16) NO problem with you, I just thought a couple of the other guys were "jumping the gun" a bit, when we aren't sure WHAT EI you have, yet!
Click to expand...

I don't think so!!! I simply told of my experience, which was: I called the manufacturer of my unit for help and it was very prompt, complete and helpful. I know that I should sit and review every post for twenty minutes each in order to see how they could potentially be misunderstood or misconstrued, but I choose to go on to other things, If the OP gets the CONCEPT, which is """Call the manufacturer for help"" fine, if not fine, I have other things to get to.
 
Sorry, orange and black wires. Going to pull the ignitor out and see what I actually have. I have power to both the pos and neg side of the coil.
 
I didn't follow this thread, but if you have one lead of a coil hooked to power, if the other lead is disconnected the voltage will be the same. Plug it in and if current can flow, then V=IR.
 
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