The Ford Barn

drgoetz · 07-28-2024, 12:21 PM

I am still having problems with my overdrive blowing fuses (7) just as it hits 28 mph. I have chased wires, verified components and have even taken the entire system out of the car.

I talked with Mac VanPelt several times and have followed his recommendations. However, at the beginning of my journey I mentioned that I had an MSD ignition system on the car. Mac said there was a problematic condition with MSD ignitions. I called MSD to find out what their recommendations would be…no problem, just install as usual….WRONG !!

I have been chasing circuits in my mind and can not figure out how the ignition cuts off momentarily and allows the primary side of the solenoid (connection 4) to go to the holding portion side of the solenoid (connection 6). What controls (grounds) the coil and takes pressure off the transmission to allow the system to work?

What have I missed; moreover what don’t I understand?

07-28-2024, 12:21 PM	#1
drgoetz Member Join Date: Jan 2011 Location: Lexington, KY Posts: 76	1950 Mercury Overdrive Blowing fuses I am still having problems with my overdrive blowing fuses (7) just as it hits 28 mph. I have chased wires, verified components and have even taken the entire system out of the car. I talked with Mac VanPelt several times and have followed his recommendations. However, at the beginning of my journey I mentioned that I had an MSD ignition system on the car. Mac said there was a problematic condition with MSD ignitions. I called MSD to find out what their recommendations would be…no problem, just install as usual….WRONG !! I have been chasing circuits in my mind and can not figure out how the ignition cuts off momentarily and allows the primary side of the solenoid (connection 4) to go to the holding portion side of the solenoid (connection 6). What controls (grounds) the coil and takes pressure off the transmission to allow the system to work? What have I missed; moreover what don’t I understand?