51 Desoto B+B carb wiring.

[Michael]

Hi,

I am Michael , new member here from Marmora Ontario Canada. Purchased a 1951 S15 custom Desoto original equipment all original and in good condition. It runs and some things work and others don`t. I replaced the battery cables with number 1 copper and heavy soldered terminals I had the carb rebuilt but feel  that it may not have been done properly since a linkage was unattached and words like `don`t need that part` were said. I finally put the linkage back in the right place. There are three wires going to the carb two to the top with terminals and one to the drivers side of the carb halfway up. I do have a manual with a wiring diagram and I do have a meter and continuity buzzer. I would like to know exactly where these wires should go and what there purpose is. Unfortunately the wires have been joined to the original  harness and the colours have been lost, they may be in the wrong place.. I also do not know what  and where the parts are that the  wiring diagram identifies such as the automatic transmission controls .....are they on the transmission? The 30 amp circuit breaker is that on that square box with four terminals ?  Is it possible for someone to interpret the wiring to the carb the coil and to that 4 terminal box and outline in simple terms where those wires should go?

 The second issue I have is the choke and carb again. If I pour gas in the carb it will start and then run ok. The manifold auto choke wire should go exactly where? and when you turn the key should it close the choke butterfly and hold it closed in the start position only? Should the gas peddle be pumped a lot to start? I did notice that the carb pump does put fuel in the venture.

Does the ignition  capacitor sit on top of the generator? Where can I get a new ignition switch? Thank you for your help.

I tried to upload photos but the files are too big.

[54Illinois]

Sounds like you have the Tip toe shift or Gyromatic as they call it for Dodge.  The wires follow down to the transmission.  One big thing is you have to get the RPM down to 450-475.  Seems low, but that will allow the vehicle to shift correctly.

[Michael]

After some serious solo research into the mystifying wiring diagram I discovered a few things.

Canadian 1951 Desoto Custom Deluxe S15 uses a Carter B and B E9A1 carburetor . There are 2 wires connected to the top of the carb, they plug into a thing called an Anti Stall Solenoid. One wire is yellow and connects to a terminal halfway down the carb body on the drivers side called a Kick Down Switch which then goes to the transmission Kick Down Solenoid and to the Governor. The other wire is red and goes to one side of the 30 amp breaker  which is located between the coil and the carb on a bracket and has 4 terminals  in a square box.The red wire then also goes to the other side of the Kick Down Solenoid.

Now if we didn't have a foot of snow and it was nice weather I could go out there and sort it out. Dear Santa..............heated garage, blah blah

[Rsw]

I have a 1950 S-14 236 Desoto Custom that has  a E7L3 Carburetor on it. The engine blew and I had it replaced with a 1951 Desoto Custom 251. I was wondering can you use the E7L3 Carburetor on the 251 or is there a difference as the 1951 251 calls for a E9A1 carburetor but I don't have the other connections for the Integral Choke. I have the automatic choke off the manifold. Please advise as the cars running off a regular carb at the moment but I want to get the right fluid drive carb for it. Thanks,

[Frank Gooz]

Good Morning,

I am not 100% sure but what i have seen in the wiring for my 1948 Desoto and my 1950 Dodge I feel that the Carburetors could be interchanged and work properly.

Good luck.