JK wont start no crank.
Thread Starter
JK Newbie
Joined: Jul 2012
Posts: 2
Likes: 0
From: chesterfield va 23832
JK wont start no crank.
I know this has been in other post which I have read but have not been successful at resolving my issue. Any help or aditional thoughts for others who have had this issue will be greatly appreciated. Trying to avoid a dealer visit it possible.
History. I have a 07 jeep jk 6spd with bullydog tuner, exhaust, and viper TB , and custome intake. Jeep has been running perfect up to changing the rear tail light bulbs to led which the ones sent were not duel filliment. I purchased new stock replacements due to one of the stock being blown. I put the new ones in and for some reason the jeep wont start. All the lights and electrical components light up and work as well as radio all come on it just will not crank or even attempt to start.
Things I have tried: I have checked all the fuses none of which are blown. Ran a new ground incase corsion is the issue. Pulled the battery to have tested by advanced and did a ecm reset. Horn honked when reconnected but it does the same thing. The tuner is stuck at initializing almost like the ecm is locked. I have also disconnected the tuner and did a reset but still the same issue. I have also tried starting in 4x4 to bypas clutch switch and moved the jeep to try and rule out cps sensor. When i go to start the jeep it turns the radio off and sometimes the electric fan for the radiator kicks on hi it sounds like. My next step was going to be try another battery incase this one maybe tested okay but had a bad cell in it.
Any one else had any issues with 6spd jks not starting or having issues similar. With the tuner not being able to connect to the ecm I cant see any trouble codes.
History. I have a 07 jeep jk 6spd with bullydog tuner, exhaust, and viper TB , and custome intake. Jeep has been running perfect up to changing the rear tail light bulbs to led which the ones sent were not duel filliment. I purchased new stock replacements due to one of the stock being blown. I put the new ones in and for some reason the jeep wont start. All the lights and electrical components light up and work as well as radio all come on it just will not crank or even attempt to start.
Things I have tried: I have checked all the fuses none of which are blown. Ran a new ground incase corsion is the issue. Pulled the battery to have tested by advanced and did a ecm reset. Horn honked when reconnected but it does the same thing. The tuner is stuck at initializing almost like the ecm is locked. I have also disconnected the tuner and did a reset but still the same issue. I have also tried starting in 4x4 to bypas clutch switch and moved the jeep to try and rule out cps sensor. When i go to start the jeep it turns the radio off and sometimes the electric fan for the radiator kicks on hi it sounds like. My next step was going to be try another battery incase this one maybe tested okay but had a bad cell in it.
Any one else had any issues with 6spd jks not starting or having issues similar. With the tuner not being able to connect to the ecm I cant see any trouble codes.
JK Enthusiast
Joined: Nov 2011
Posts: 174
Likes: 0
From: Cornwall, NY
Battery
Start simple, use another battery. In my jeep, 2012 - sport, battery terminals were tight by the nuts but could move terminal from side to side. This caused a drop in voltage making the ecm send out all types of codes and jeep would not start. Replaced the batter it and cranked down the terminals and all the problems went away.
