The two rear lightcircuits pass through the electronic flasher before going to the rear lights. After that they individually pass through separate areas of the central junction box (fuse box). Since they pass through separately, it is unlikely that the junction box is effecting both so the odds are with the electronic flasher under the dash on the driver's side.
Make sure you haven't overlooked the basics like bulbs and connectors.
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Saturday, November 15th, 2014 AT 5:29 AM