Interior lights not working on 2003 Wrangler Sport -
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Unread 09-27-2015, 09:11 PM   #1
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Join Date: Sep 2015
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Interior lights not working on 2003 Wrangler Sport

We just bought this 2003 Wrangler Sport & can not get the interior lights to come on. We have checked the bulbs & made sure that #4 fuse behind the glove box has a fuse in it but according to the test light, it is not getting any power at that fuse. We also checked the door switches to make sure that they were still hooked up. Could anyone tell us where to go next if there is no power coming to the #4 fuse for some reason? Thanks in advance!

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Unread 09-28-2015, 02:30 AM   #2
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2000 TJ Wrangler 
Join Date: Oct 2010
Location: Clyde, Texas
Posts: 1,833
Fuse 4 in the fuse block doesn't provide power, it provides a ground path for the door switch sense circuits for the instrument cluster. When the instrument cluster sense circuits are grounded, the cluster will turn on the interior lights -- the power comes from fuse 26 in the PDC (which gets its power from fuse 15 in the PDC). If you're not getting power from the fuses in the PDC however, you should be getting a message in your odometer readout that says "NO FUSE". If you're not seeing that message on your instrument cluster, then the problem probably lies with either a bad fuse in the #4 slot of the fuse block, or a lack of good continuity to ground between the door switches and ground G300 in the outboard side of the driver's side footwell. If your Jeep's previous owner is anything like the one for my '05, you'll most likely find the wires for the switches disconnected if you look up in the footwells.
2000 TJ SE
2005 LJ Rubicon
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