How to Wire a 4-Terminal Solenoid That Replaced a 3-Terminal Solenoid
Question:
On a four post solenoid as a replacement for a three post one I hooked my starter wire to the one marked with S and nothing to the I side and the battery wire to the right side and the starter wire to the left post, this on an old Ford tractor I was assured this would work. Have I missed something, it did not do anything. it had a good ground
asked by: Kenneth B
Expert Reply:
A 4-terminal starter solenoid like the Pollak # PK5230701 needs to be wired so that the 12V power in/out is connected to the two larger terminals while the two smaller terminals are connected to ground and an ignition source. A 3-terminal solenoid grounds through the hardware so if you didn't run a wire for ground to the 4-terminal solenoid then that is your issue.
If this doesn't fix your problem let me know what solenoid you are using and if we carry it I can reach out to the manufacturer for any other recommendations.
![Jon G](https://images.etrailer.com/static/images/catg/people/1086_tn.jpg)
Product Page this Question was Asked From
Starter Solenoid - SPST - 12 Volt - 100 Amp - Continuous Duty - Insulated - UL Listed
- Accessories and Parts
- Battery Boxes
- Switches and Solenoids
- 100 Amp
- Pollak
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Marcop
8/13/2020
Thanks Jon G. Following your advice I was able to fix my solenoid problem.