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Hello. Welcome to Just Answer. Please allow me to assist you. Let's start with some power tests. You say you have no power in the Green wire. Ok. That is power to the lamps. Let's check to see if we have power in the 10 amp TAIL fuse socket. This will be the 6th one down from the top on the far left column of fuses in the fuse panel in the engine compartment. Pull the fuse and see if there is power on either side of the fuse socket. Thanks
This would be with the running lights turned on.
No power on either side of the fuse? With the fuse removed and the lights turned on? (I have to ask cause I ma not there to see; sorry)
Please remove the taillight relay, and check for power in the relay sockets. You should have power in 2 sockets. Same fuse panel