comanche12 Posted December 7, 2011 Share Posted December 7, 2011 Its been a week to try figure out whats wrong with my MJ that have no crank condition what i did so far to inspect -battery is O.K. (new interstat battery) -new positive and negative cables. -wiggle on connector for ignition switch Result is that there no lights come on the instrument dash board. my blower is work(custom by-pass power supply) though. so... what should I check to find the stubborn electric gerlmin. I read somewhere on this forum that it said "try jump + from battery to a specific alternator wire" but havent do it. :dunno: edit: I hope its not ECU or ICM issue. :peek: Link to comment Share on other sites More sharing options...
Pete M Posted December 7, 2011 Share Posted December 7, 2011 far as I know, the engine should crank and the lights should work even if the ecu was unplugged. :thumbsup: Link to comment Share on other sites More sharing options...
comanche12 Posted December 7, 2011 Author Share Posted December 7, 2011 oh really? alright good! i forget add this... when i looked at the relay thing that battery + cable connect to it. its cover with dry mud and sand. maybe its cause the issue? Link to comment Share on other sites More sharing options...
Pete M Posted December 7, 2011 Share Posted December 7, 2011 that should be your starter relay. have someone turn the key and check if it's getting 12 volts. if so, it might need replacing. it should make a click sound (I bet you can feel it with your fingers) when the key is turned. also, you should probably clean out all the mud. :D Link to comment Share on other sites More sharing options...
comanche12 Posted December 7, 2011 Author Share Posted December 7, 2011 hm so starter relay. what if no volt? then its bad starter relay? I don't remember if I felt the click :oops: yeah thats reason why I have simple green bottle. :thumbsup: Link to comment Share on other sites More sharing options...
Pete M Posted December 7, 2011 Share Posted December 7, 2011 the starter relay gets power from turning the key and then clicks and allows the main batt cable to send power through the big cable down to the stater. Link to comment Share on other sites More sharing options...
comanche12 Posted December 7, 2011 Author Share Posted December 7, 2011 isnt that starter solenoid? Link to comment Share on other sites More sharing options...
comanche12 Posted December 7, 2011 Author Share Posted December 7, 2011 just make sure... as i say that my instrument light don't come on after turn key on. Its would still caused from a failure start relay? because, I just pulled the electric diagram up and research. which i noticed that the instrument light will come on after turn key (ign switch) not after starter relay? :dunno: I just want to make sure it clear for me. Link to comment Share on other sites More sharing options...
comanche12 Posted December 8, 2011 Author Share Posted December 8, 2011 *update* I tried to jump from power to dark green colored wire on starter relay. make sure shift is in neutral. then starter is work and cranking my engine. Then I try jump to green colored wire for ignition. nothing happened. i see the black w/tr colored wire. its might be ground. i jump it to ground to see if ground is bad or not. still nothing. :dunno: I forget to grab my voltmeter from work :doh: btw I tried to see if I can feel the click while turning the key... nothing just feel stiffen turn. Link to comment Share on other sites More sharing options...
Naterenfo1 Posted December 8, 2011 Share Posted December 8, 2011 IIRC the wire on ignition that needs to be jumped is a 8-10ga yellow wire? just get a 12 volts positive on it (jump to the positive on battery) Link to comment Share on other sites More sharing options...
carnuck Posted December 8, 2011 Share Posted December 8, 2011 Sounds like maybe the ground on the block is loose/corroded? Pretty common. Otherwise, fusible link. Bat + to main terminal on alt and the dash lights should come on with the key. If not, toasted ignition switch probably. Link to comment Share on other sites More sharing options...
comanche12 Posted December 12, 2011 Author Share Posted December 12, 2011 IIRC the wire on ignition that needs to be jumped is a 8-10ga yellow wire? just get a 12 volts positive on it (jump to the positive on battery) where can i find the 8-10ga yellow wire? i don't see them on starter relay but seen two different size yellow wires on ICM. noticed the smaller one is loosen. like its can come off out the connector. Sounds like maybe the ground on the block is loose/corroded? Pretty common. Otherwise, fusible link. Bat + to main terminal on alt and the dash lights should come on with the key. If not, toasted ignition switch probably. yea I think same thing in first place but ground on the block is still clean and tighten as secured. ill try jump it and hopefull light will come on. Link to comment Share on other sites More sharing options...
comanche12 Posted December 13, 2011 Author Share Posted December 13, 2011 just got new starter relay. just make sure before install new one in. there 4 terminals as obv but as my wiring diagram said for starter relay: terminal F- didnt show on diagram. terminal SOL-for starter(DK Grn wire) terminal I-ignition(Grn wire) terminal G-ground (Blk w/tr wire) is it correct? Link to comment Share on other sites More sharing options...
comanche12 Posted December 13, 2011 Author Share Posted December 13, 2011 ok what did i do tonight- -replaced new starter relay, still no crank -jumped on yellow wire on ignition switch connector. nothing happen. even on dark green too. nothing. -tried bypass power to yellow and dark green. still nothing. -by pass ground, still nothing. -checked fuses, found gauge fuse has cracked but not blew. replaced and still nothing happened. :dunno: :help: what can i do by next? i doubt its ignition switch tho. Link to comment Share on other sites More sharing options...
Pete M Posted December 13, 2011 Share Posted December 13, 2011 does anything work? headlights? Link to comment Share on other sites More sharing options...
comanche12 Posted December 13, 2011 Author Share Posted December 13, 2011 does anything work? headlights? Yes headlight is work, blower is work(bypass power because of out of shape fuse block. Planned to replace fuse panel ASAP later with DIY from this forum Only isn't work are no crank, nothing happened on instrument cluster gauges after turn the key. Link to comment Share on other sites More sharing options...
maddzz1 Posted December 14, 2011 Share Posted December 14, 2011 Did you check all the fusible links? My guess is one of them is bad. Link to comment Share on other sites More sharing options...
comanche12 Posted December 14, 2011 Author Share Posted December 14, 2011 That's what I'm thinking about. I don't know where those main fuse links are at? Near fuse panel under steering column? Sorry for be a noob :dunce: Link to comment Share on other sites More sharing options...
maddzz1 Posted December 15, 2011 Share Posted December 15, 2011 That's what I'm thinking about. I don't know where those main fuse links are at? Near fuse panel under steering column? Sorry for be a noob :dunce: No, they are under the hood between the battery and the power dist center. Link to comment Share on other sites More sharing options...
comanche12 Posted December 15, 2011 Author Share Posted December 15, 2011 Alright thanks, I'll check it out ASAP when raining stop soon. :wrench: Link to comment Share on other sites More sharing options...
comanche12 Posted December 20, 2011 Author Share Posted December 20, 2011 I just took a look at my jeep under hood. I can't find those fusible links as location you told me to take a look at. Only I see right now at this location are starter relay, couples relays, OBD I, battery and vacuum ball canister thing. Do any of you guys have a picture of that fusible link area? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now