SOURCE: 2001 Jeep Grand Cherokee which fuse controls heated seats?
Fuse # 20, located in the Junction Block (interior, drivers side). This is a ten amp fuse.
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Read the information at the above site. The TSB (technical service bulletin) may be of interest to you.
SOURCE: 2001 jeep grand cherokee lights
The problem is with the connection from the light bulb holder to the socket that the bulb and holder go into. I believe on my 01 JGC it was the top light that was going out when i applied the brakes with the lights on. If you remove the light bulb holder in the tail light assembly and look at the area that the bulb and holder came from either the metal that makes contact with the holder for the bulb is depressed, or in my case it was cracked. You can use a small flat scewdriver to lift the metal in the tail light assembly, or as i did, i just put some tin foil on top of the metal, then reinstalled the bulb and holder ontop of the tin foil (this makes the elec. connection). seems like a rigged up solution, but made sense to me, and worked!
SOURCE: the tail lights are out, so the brake lights-Jeep Grand Cherokee
i have a 2002 jeep grand cherokee i had the same problem when i would apply my brakes when the headlights were on my brake lights would go out, i found that my bulbsocket was not making good contact with the socket housing, if you notice when you take off a bulb, look at the light fixture where you unscrewed your breaklight bulb you will notice 3 medal contacts-they should be silver in the socket housing and like a copper on the socket bulb, in the socket housing their should be 2 silver contacts together and 1 by itself the one that looks by itself is making bad contact with the copper one thats by itself on the bulb, what you can do for a quick fix is; get a small piece of low cage wire or a thin piece of metal like copper stick that in to the bottom or top of that metal contact--i did it through the bottom leave the wire or piece of medal sticking out enough for where it can get contact with the bulb (just a little wire is enough to make contact, now screw the bulb on and test it---it will work----i did it to mine, if you need more assistance let me know [email protected]
SOURCE: Turn signals not working on 2001 Jeep Grand Cherokee
replace the turns signals flasher unit.
SOURCE: 1999 jeep grand cherokee - brake lights and turn
The tail lights and the brake/turn lights use the same bulb but, there is 2 filamants in the bulb. One for tail lights and one for brake/turn lights. So just because the brake lights and turn signals work doesn't mean the bulbs are good. If bulbs are good you can check to see if there is power getting to the tail light assy's by unplugging the connector at the assy and using a test light probe the connector (harness side) with the headlights on. If you are getting power to the assy the test light will light. To make sure, turn off the headlights and test light will go off. Hope this is helpful. Good luck.
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