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Why wont your 1999 Jeep Grand Cherokee headlights will not turn off Switch at any position does not help. Day or night the lights run and kill the battery.?
Wiki User
∙ 19y ago
Problem solved this way. The Jeep had a dealer installed theft protection system that went over and above the factory installed one in features. It had lots of unused wires and stuff as remnants of the system that was declines at purchase time...they try to sell the upgrade and if refused, take the heart away and leave a bunch of wires. In looking at the fuse box, one white wire fromthe mess of security wires was running to a fuse. I figured that's where I would start. I pulled the fuse and the lights went out. I removed the white wire that was jumped to the fuse, replaced the fuse, and now everything is back to normal. The headlights are off when in the off position. On when in the on position, and auto-on when it gets dark when in the auto position. It appears that the additional security system the dealer installed for the dealer-lot peace of mind may have included features that would turn lights on if you banged the window or body, jiggled the door handle, etc. This may have gotten 'stuck' on and disconneting the wire took power away from this shorted or faulty system. The thing have been there since new but went bad five years after the sale.
Wiki User
∙ 19y ago
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