How would I know what the original wiring specs were for the '48? Is there some guidance or schematic on this somewhere?
I am no genius on wiring, but I have used the wiring diagrams in the GSS-1411 in conjunction with the wiring diagrams on the ATIS site. That helped a lot. The GSS-1411 can be found on the Manual Server at the link below and under the Blue Ribbon Manuals link.
It looks as though the original ignition had a built in coil (still in place) and a condenser (missing) with a coil cap that held everything down.
You are correct on that one. The mag originally had a built-in coil, and condenser with the points in behind the rotor. Most PO's when the coil went, just put an aftermarket or whatever coil they had as an external coil and keeping the points and condenser where it is. Some even had the condenser on the outsitde as my 48 did.
You are in luck though.
There are a few people on this board - DONNY comes to mind real fast who can help you rebuild your internal coil. Just ask em, and I am sure you will get lots of help.
Also, the rotor was replaced sometime with one that is much larger than the original shown in the parts catalog for that model year.
Easily fixed. Your CaseIH dealer, or Case Parts On-Line
and I think NAPA has the correct rotor.
No original voltage regulator either so I'm assuming that that's what the cutout was for on the light switch.
47's and 48's did not have a regulator, but a cutout instead. You will find this usually mounted atop the generator. Cutouts have 3 terminals and Regulators have 4. Jim, did I get that correct??
As previously stated in my thread, the new ignition is wired with a voltage regulator that's basically a 3 lead black box mounted on top of the generator. A newer cylindrical coil and condensor is mounted next to that near the magneto. The old coil has been completely disconnected and a wire was added from the points to the newer coil.
Standard procedure and very easy to correct. Replace the condenser and insert into the mag under the rotor head along with a new set of points. (good to do this anyways) Make sure the gap is correct according to the manual. As for the coil - above comment still applies. Also, new coils are available right from CaseIH, but do not whatever you do, throw out the old internal coil. Guys like Donny can rebuild it again and someone in dire need of an internal coil will then have access to a rebuilt.
As for the last question, well I somehow managed to fumble my way through and have it connected correctly. I now have both charging positions and both dim and bright lights... just have to replace the 1129's with the proper 1133's.
Do as Jim Becker suggested first. He walked me through my problems, and he can walk you through yours. If all else fails, then go with the next suggestion. Try to keep it original if you can.