View Full Version : 1957 ignition coil

01-29-2015, 06:38 PM
I think I read that OEM 12V ignition coils for early Thunderbirds had yellow tops. Will any of the yellow top 12V ignition coils work for a 1957?


01-29-2015, 06:52 PM
Yes. Be advised that some 12volt coils have an internal resistance. The markings are normally stamped on the bottom of the coil.

If your coil has no internal resistance you will need a ballast resistor. Coils that need more resistance usually get hot to the touch, so hot that you cannot hold it.

01-29-2015, 07:05 PM
The correct coils will say "USE WITH EXTERNAL RESISTOR" on the label.


01-29-2015, 08:56 PM
Thanks, you all!

In a previous post I had a radiator issue that ended up only costing me $100. I was fearing I was going to have to replace it or have it recored. It was two leaks on the tank. It was discovered to be a heavy duty four core.