Ok , here is where I’m at I had a blinker relay that was buzzing some times. I bought a new made in the USA blinker, pulled the lower plastic and metal panels, found the blinker right where it should be, pulled the blinker relay replaced the new one(oh yah bought two for twice the price just in case you know how that goes. Blinkers was working before and now no head lights, no turn signals, no left hand parking light have brake lights but no tail lights. 😜🤪.checked interior fuse #7 10 amp. Fuse is good. Pulled every fuse in the under hood fuse box and no blown fuse can’t figure where to go next. Car starts, runs good ac work great, drives fine. Just no tail lights, left parking light, yess the flasher was checked before lug in pins where copped from the old flasher tried both new flashers nothing. Turn on the head lights and only have right side parking light. I have searched through hundreds of posts on fuse blown and fixes on this and have found nothing. Must not be asking the right search phase.
2000 Cherokee xj, 4.0 AW4 automatic
CH

 

Anyone?

 

check EVERY fuse under the dash with a test light

after that you need to use the Service manual to check for voltage at various points till you narrow down the issue.

could be bad wires in a harness

 

Found the problem, fuse12 10a red one in fuse box inside was blown. The head lights have a relay feed direct from the battery the right head light turns on both relays
which is also feed from the fuse12 leg. So I’m good to go again. Man was it hot today real feel was in the 100+ Realfeel. Glad have my jeep back my other toy is hard on the gas fund these days it is a Trailblazer SS with the LS2 Vette engine AWD, that 500 Pony’s sucks that fuel down, but it is fun to drive.
any way thanks for the help.
CH