Does the car has a seat belt reminder light, and is it blinking at th
normal rate? The reminder light uses the same blink relay as th
turnsignals. The relay is an old fashioned electromechanical device (a
least in my -85 245) and, since it's function is load current dependent
it can be worn out in such a way that it functions normally for the loa
of all six lamps, but not for only three. Maybe you should try wit
another relay?
Lar