Ballast resistor - 86 LMC 1200

I am having difficulty locating the proper application for my cat. I have found many types and resistence. (spade connections, bolts to adapt spade, and screw terminals - also resistence from .5 to 1.9 ohms) I have been told I need to read the ohms from a meter to pinpoint the exact resistence. The cat is at the Cabin and I am 60 miles away.

It has an electronic ignition (no points) I cannot locate an ignition module so am not sure if it is Duraspark. I will try and attach a picture of it in the cat. Research has given me many opinions and the servive manual gives me a Ford numbers (N-25-1 :B8A-12250 A :FEU-12250 C) When cross referenced at most part stores I get an array of choices from .5 to 1.9 ohms and connection types.

I have found a variable resistence (.75 cold and 1.5 warm) from Mallory (#700)

http://mallory-ignition.com/points-ballast-resistor.html

Any help would be appreciated to find the correct application. I replaced the coil (std-fd-471t) but the RU-4 resistor they gave me was not correct according to the mechanic so we did not replace the current one.

Any help would be appreciated. (it is a Ford 300 IL 6) Thanks.

that looks like the old duraspark 1 system jeep also used this same for some of their products.

In case anyone is interested, here is what I found when I went up and put a meter on the coil and ballast resistor. Ballast resistor 1.6 ohms. Old coil (std-471) 1.5 ohms. New coil (std-471T)
1.3 - 1.4 ohms. Electronic Ignition is Pertronix.

http://www.pertronix.com/prod/ig/ignitor/default.aspx

I am leaning towards a Flamethrower, epoxy filled (as opposed to oil filled), 1.5 ohm internal resistance coil and a 1.6 ohm external ballast resistor from Jegs.

http://www.jegs.com/i/Pertronix/751/40111/10002/-1
http://www.jegs.com/i/JEGS-Performance-Products/555/40102/10002/-1

Any input would be appreciated. Pictures of distributor / Pertronix Ignitor attached.

if it were me I would change to a dura spark 3 system with the high output coil 8 mm wires and huge cap one thing I can say is I never seen an hei ford cap ever have a problem even when sprayed with water. and parts are easy to acquire at the local auto parts store

Thanks. If the new parts above do not put an end to my "issues" it may be the best way to go.

In case anyone is interested. I spoke with a tech at Pertronix and he identified my electonic ignition module as a Pertronix Ignitor #1262. He also sent information on how to check the components of the system as well as specs for it's operation.


I found it an interesting read.