Rear Blinkers Electrical HELP

[CATrucks]

I have been driving with out blinkers for a couple months now cause I cant figure this out. Finished restoring my 65 six months ago, new wire harness, fuse box, blinker switch bulbs and everything. Blinkers were working fine, then I removed the rear end and regeared it, put it back to gether, did NOT touch any wires. Once rear end was back in, i turn on ignition and the rear lights both blink as if I have hazards, but front blinkers work fine. Nothing will get the rear lights to stop blinking except removing bulbs, or blinker on fuse box (which i did so i can still have brake lights.) What could be the problem? Seems like it could be a ground problem for the rear? its grounded to the tail light housing right? But if it was bad ground, wouldnt tail lights not work at all? Maybe blinker switch? But front blinkers work fine... Please help!