No start, jumped then flashing crazy lights
01-31-2014, 06:28 PM
#1
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No start, jumped then flashing crazy lights
Any one seen this? I was in drive thru tonight and turned jeep off to use key to open locked console. When I tried to restart, Jeep would not start could not get out of park. After a few minutes of blocking the window I was able to get out of park and push to parking lot, luckily down hill. I had to jump start to get it to start and during drive home I had flashing headlights, flashing brake lights, clicking sound from gear shift (auto) speedo jumping around, engine revving while driving with my foot steady on the gas. Tach seemed stable. Would not start when I got home. 2012 JKU with auto and sadly no mods yet. 36800 miles. Any help would be appreciated. Also all the dash lights flashing on and off as I drive.
Last edited by jimbjk68; 01-31-2014 at 06:33 PM.
02-01-2014, 03:05 PM
#3
JK Freak
Check ALL the connections to the battery. I had one bad connection which caused an intermittent low voltage to the computer and made it do some random ass weird shit. New battery lugs solved it for me.
02-01-2014, 03:57 PM
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And just a friendly reminder that on new computer controlled vehicles to never connect jumper cable negative to the dead vehicle. Ground somewhere else cause it can fry your computer.
02-01-2014, 06:31 PM
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02-01-2014, 08:48 PM
#8
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What I've always been told is it back charges the system. If that makes since. Its only on newer cars they suggest this. Well 80's+.
Last edited by Tooadvanced; 02-01-2014 at 08:52 PM.
02-02-2014, 06:01 PM
#10
JK Freak
Yep - I had the same thing happen on mine, battery had neared it's end of life. For some odd reason the low voltage seems to trigger the security system as it's final act before going completely dead.