I had the same problem a few years ago on a n/a Ep91 , thought it was the stalk or relay , but turn out to be the signal switch 12v wire from the stalk to the fuse box ( the one that tell the lights to come on and off when you turn the stalk ) , the wire looked fine but had corrosion inside causing it not to be making a connection , so replaced about 30cm of it and was spot on . The best way I found was to check was get a multimeter with long ends and test from the stalk plug to the bottom of the fuse box relays / light fuses for Continuity and that will highlight any issues if there is a brak