All exterior lights work except left front and left rear turn signal lamps. I get the bulb failure indicator most of the time but not always and sometimes get rapid flash when using the turn signal switch or hazard switch but not always. Checked bulbs and sockets ok. Swapped bulbs between sides. No change. Swapped bulb failure modules between front sides and then rear sides, Could not get problem to move to right side. Removed and inspected CPU (under glove box) but found no problems. According to wiring diagrams, there is not a common fuse for both left side, front and rear. Any advise would be helpful.

Thanks in advance,
Larry