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Help with Solenoid wiring

P

pfeffer

New User
Originally the solenoid - wiring to switch was made to the "s" terminal of the solenoid giving it 12v from the switch to energize the solenoid. New solenoids only have an "I" terminal. Problem is that 12v to the "I" terminal does not energize the solenoid. Only by sending the "I" terminal to ground does it work. Can you wire this way without damage???
 
What is it on? You know what you are looking at, but the rest of us are lost without knowing what the equipment is.

My first thought is you have the wrong solenoid for your application.
 
Do you have a picture? There should be 4 terminals, possibly 5 with the 5th being an extra ground. One takes power and one goes to ground, which will energize the solenoid, the other two it will simply complete the circuit.
 
What are you working on?? There is more then one type of solenoid and you need to have the correct one for what your working on. A solenoid made for a Ford car will not work correctly on an 8N ford and that is just one example
 
(quoted from post at 09:42:10 01/15/20) Originally the solenoid - wiring to switch was made to the "s" terminal of the solenoid giving it 12v from the switch to energize the solenoid. New solenoids only have an "I" terminal. Problem is that 12v to the "I" terminal does not energize the solenoid. Only by sending the "I" terminal to ground does it work. Can you wire this way without damage???
Click to expand...

Sorry, its a 52 8n converted to 12v
 
Sounds like you don't have the correct matching solenoid you had before HOWEVER sure iffffffffffff it has sufficient current and voltage rating, has the right coil voltage applied, and you can wire it so as to activate it by supplying a switched ground IT CAN WORK. I don't know your application or use or the solenoids specs so I cant guarantees this however @!!!!!!

Many older Ford solenoids with the S and I terminals used S for activation and I to by pass an ignition ballast resistor when cranking the engine. That I was hot ONLY when the solenoid was engaged.

If it has specs to suit your needs it CAN WORK if you wire it correctly.

John T
 
An 8N would use a 3 wire solenoid and it has a start terminal and then 2 bigger ones and they have to be hooked up correctly. One of the large terminals is for the starter side and the other the battery and if the 2 large ones are hooked up backward it will not work right
 
(quoted from post at 11:42:10 01/15/20) Originally the solenoid - wiring to switch was made to the "s" terminal of the solenoid giving it 12v from the switch to energize the solenoid. New solenoids only have an "I" terminal. Problem is that 12v to the "I" terminal does not energize the solenoid. Only by sending the "I" terminal to ground does it work. Can you wire this way without damage???
Click to expand...

What is the make and the part number of the solenoid you have?

The "S" and "I" markings are MEANINGLESS because there's 3 or 4 ways the solenoid may be wired up internally, and nowadays the use one generic "housing" and the innards don't necessarily correspond to the external markings.

Sounds like you MAY have the correct solenoid for that application, but it doesn't work with the modified electrical system you have.

The original solenoid was an "isolated base" solenoid, there was no internal connection between the solenoid coil and ground.

One end of the winding was continuously powered internally from the large stud where the battery cable connects, and the other was connected to the transmission-top neutral safety start switch the provided a ground path when pushed to energize the solenoid.

Was that safety switch no longer being used when you started this project?

Here's a circuit that I like to use that provides the safety of the tranny-top neutral safety button AND the ignition must be switched "on" for cranking to occur.


8N4-wire%20solenoid.jpg
 
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