Hey. New to this forum so hope this is the right place to post this question. If not sorry about that.
So I've just bought a 2000 WJ 4.7 V8 after my 4.0 6 pot blew up, I'm having an issue with the left side rear lights (RHD) the indicator isn't working on the left side rear cluster and making the indicators flash quickly. I changed the cluster including bulbs from my old jeep that worked correctly while on the old jeep but I still have the same problem. I can't see any wiring issues with the plug and checked the fuses, I haven't changed the flashes relay as I thought if that was gone no idicators would work or the hazard lights. Any help would be great thanks buds

 

Just to clarify, you have no function at all on brake, turn or running lights on the drivers side rear taillight and it's causing the dash indicator to flash rapidly?

 

Those taillights are troublesome. The connections are on the actual tail lamp themselves which makes for poor contact. Try and clean em up and see if that works.