Triumph Repair: Overheating Mk IV Spit, clutch fluid, clutch cylinder

Question
The timeing was recently advanced on my 72 Spit. I understand this could case the engine to overheat.  Shortly after my turn signals wouldn't work. Popping the bonnet I noticed  my clutch resevior had spurted fluid and the area was wet. Could that spurt has soaked the fuse box causing the failed turn signals?  The rest if the electricals work: headlights, runningn lights, etc.

Answer
Yes.  advanced timing can cause an engine to run hotter as timing too far advance start to "fight" itself and the flame front in the combustion is expanding before the piston has reached top dead center.

Brake/Clutch fluid (Dot 3/4) is fairly corrosive, and will peel paint off metal and will cause some plastics and rubber to melt.  Only certain special rubber, like those inside the clutch cylinder is resistant.

So you, brake fluid could cause electrical shorts.