DFlintstone

The CPS does not affect cranking. If the Bat, it's connections, and the cables are OK, and it doesn't go when you jump to the solonoid terminal on the starter, the starter is done. Last time I did it a put a meter right on the Pos. cable on the starter to be double sure it had power, before buying a new starter.

holycaveman

Alright, alright.

Take the battery out of the jeep. Grab a set of jumper cables.

Take everything under the jeep and hot wire the starter directly using the cables and the battery.

Negative goes on starter motor housing, mounting bolt etc... positive goes where your current cable is hooked up to the starter.

If it does not crank then throw that pos starter in the dumpster. If it turns over then run a new starter cable.

DFlintstone

???? from one (agnostic) Caveman to another....removing the battery from the Jeep likely will not change anything!

holycaveman

It's called isolating the problem area. He already jumped it with no result. This eliminated every solution except for the starter power wire and the starter. By removing the battery and hooking it up directly it tells you if the power wire is bad or the starter.
If you know anything you realize tests are not to be completely trusted from auto parts places. If you don't know this then you don't have enough experience to know this. This is why mechanics do not take parts to be tested to salesman. They are simple to test on your own.

kengofff

The problem can still be with the starter solenoid. My guess is the person at the parts store put power to the motor terminal, that by-passed the solenoid. If you put 12v to the solenoid terminal with a good ground and 12v to the battery terminal at the starter the solenoid should pull in. For some dumb reason this is the kind of thing I like to trouble shoot in person. If you were close I'd check it out and would even give you a starter to put on.

holycaveman

Exactly.

DFlintstone

Phrase the lord, I've "seen the light". I don't know how to thank you.

holycaveman

You could start by acting like an adult.

Parsnip

Actually, if he really wanted to isolate it with the "take the battery out" technique (which makes no diagnostic sense.) He would ground to the starter body and hot to the terminal going into the starter itself. To test the solenoid, leave the battery in the jeep, jumper the battery hot to the small signal wire. Honestly this all sounds like a bad ground though. Refresh the dipstick stud is my vote.

holycaveman

If someone is wanting advice on here I try an simplify it. No you don't have to remove the battery. But chances are the parts store tested the starter by hooking it directly.
By hooking the ground to the body you are assuming AL grounds are good. By using the starter cable and hooking it directly you assume the cable is good.
By simply bypassing the starter cable and hooking ground directly to the starter you are testing the solenoid and starter only without assumptions. If the solenoid is bad on an older starter you are better off replacing the old starter.

Bad ground is possible. Although I rarely ever come across this.

DFlintstone

Oh SHOOT! Darn...I'd thought I'd finally gotten it. I'll keep studying...maybe someday I'll get a Grasp. I'm trying my hardest Hollycaveman please continue....

holycaveman

Or not.......

freegdr

Autozone tested it .lol...

Parsnip

I work for a parts store, if we test it and it's good, the starter is in fact good. And yes, we do get shops that bring us parts to test, because our machine actually tells you what's up. For a starter, you have to hook it up as it's in the vehicle. Ie, battery to the terminal, and a small, 14ga signal wire to the relay terminal on the solenoid. So if it was tested at a parts store, odds are it's fine

holycaveman

Keep in mind I meant no personal offense. You just never know who you are getting that is doing the testing.