I have a 1990 cherokee that the engine wont crank but not all the time i have replaced the switch and relay,the starter works fine if i hot wire it any body have this problem???Thanks

 

replace the starter.

 

New cables and battery? You replaced the ignition switch? It will start when you jump the starter solenoid? Is it an automatic? If so have you tried starting it in neutral? Do your reverse lights come on in reverse? If not than try jumping the nss. There are some good posts about rebuilding and jumping. If that doesn't do it i say starter.

https://www.cherokeeforum.com/f2/how...-switch-29581/

 

Sounds like you need a new starter.solenoid is probably junk

 

Have new battery and all the cables are good,i don't see how it can be starter because it starts if i run a wire from battery to the starter relay the green wire will make it crank and it don't do it all the time LOL...

 

I think what these guys are saying is not necessarily the starter is bad but the solenoid. Replacing the starter is about the same cost snd you have a nw starter. I would check your nss then replace the starter

 

check out my write-up on this topic:

https://www.cherokeeforum.com/f51/no...nostics-78934/

 

I saw that about the NSS and that mite be it,it starts fine in the morning then drive to work and turn it off and try to restart and it wont crank but go out at lunch 4 hours later and it will start right up and after work it starts fine LOL its driving me crazy!!!

 

Next time it does it try holding the key in the start position and wiggling the shifter in park, or placing the shifter in neutral and trying to start it. It sounds an awful lot like an NSS issue.

 

Yeah i tryed that it didn't help,i'll take it apart and clean it this weekend thanks guys...

 

Before you go pulling the whole thing out and cleaning it it will be much easier to jump the connector. That will tell you if it is the NSS for sure.

 

What wire do you jump or do you know?

 

dont forget to check the starter relay by the battery

 

Here's is a diagram of the nss connector. You can jump pins B and C to test if it us a faulty nss.

 

Ok jumped the wire this morning and then drove it around and NSS must be the problem so looks like i'll have to clean it up..Thanks for the help guys..