[urq] Battery light goes on after 'clicking' sound

[Maurits Jonkergouw]

Hi everyone!

My urq is finally running again after 9 months and I'm very pleased ;-))) I picked it up just yesterday and it runs beautiful and smooth, throttle response is great. Fast too!

Unfortunately there is a problem: the battery light stays on after switching the ignition off if the engine is warm.
 
- New battery
- No battery light w/ running engine
- Alternator charge:
   ~13,95V @ idle
   ~14.07V @ 2500 rpm
- No battery drain


I did notice the following though:

A) if I restart and rev the engine with all electrics switched on for a few seconds and shut off (key out), the battery light stays off, just like normal.

B) after a few minutes, a medium loud mechanical 'clunk' sound (somewhere in the middle of the engine bay) 'turns' the battery light on again, unless I repeat step A).

C) Heidi keeps telling me the coolant temp is too high - in fact the water temp gauge does indicate +1 LED over  N - but in all my days, I never saw water temps this high so I guess Heidi's wrong... The hose does feels a bit 'hot to touch' but isn't that normal?

D) If the engine is cooled down, the battery light doesn't come on and there is no 'click' either: I've repeated step A) just now with cooled down engine and everything is normal.

Any clues of what this clicking 'clunk' noise could be and how it could trigger the battery light only when hot?

Thanks.

Regards,
Maurits

1986 quattro GV