My first thought was those two large terminals are reversed. Is it possible that pair is turned around? If not, pull all the wires off the large studs. First be sure the solenoid clicks nice and strong when you turn the ignition switch to "crank". It must release when you release the switch. You'll hear it easily from inside the car. Next, take that pair that are molded together and touch just the one that comes from the battery positive post to its stud on the solenoid. Watch very closely when you touch it to the stud. If you see a small spark, it's on the wrong stud. Either the solenoid or the pair of wires must be turned around.
If there is no spark, connect just those two molded wires and leave the other ones off the large studs for now, then see if it works correctly. Also be sure that unused smaller stud on the bottom isn't touching the larger terminal next to it.
Wednesday, January 20th, 2021 AT 12:54 PM