What is the Difference Between 3 and 4 Terminal Solenoids

Question:

what is the difference between a solenoid that has 1 small terminal in the front from 2 terminals.the on for my 52 dodge had one and i bought one that has 2.should i switch it ?

asked by: Daniel

Expert Reply:

A solenoid that has 3 terminals total such as # PK5231201 grounds through the mounting hardware so it must be attached to a clean and corrosion free bare metal surface (if not otherwise internally grounded). A 4 terminal solenoid such as # PK5230701 requires a separate ground wire. You could use either style provided it is rated properly for your application.

expert reply by: Michael H