That inside fuse box is known as the Junction Block...has plenty fuses in it for lights, indicators etc. The BCM is located behind the Junction Block. The Owners Manual gives you some information of what the fuses do but the 2005 KJ Service Manual in the Sticky above will give you detailed wiring and fuse information.
If you have an After-market trailer package you could pick up all sorts of problems.
The factory fitted tow package I have has separate relays added for the trailer...they do not merely tap off the existing Jeep lights as some of the After-market kits do!
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2002 Export 2.5 CRD
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