When I start my '87 Syncro Westy the LED flashes as it should, then stops.
Recently it has been coming back on blinking, sometimes for a bit, then
stopping by itself. Other times it stays until I turn the power off and
restart.

Burp tank is full and cap sensor is duly wiggled. Still happens.

I know there is a voltage regulator and a castapitor on the instrument
cluster. Is it time to shotgun these, or might there be a better starting
point, given my symptoms.

TIA,

Tom Salicos
'87 Syncro Westy EG-33