At 10:11 PM 4/30/2014, Mister Tom wrote:
>Is that the "big" electrolytic  capacitor? Does it charge up to say the test
>time period is done, to stop the test flashing?

Exactly.  The actual blinking is accomplished by the LED itself; but
the driver circuit inside the gauge times out when that cap reaches a
certain percentage of full charge.  When the cap gets leaky it takes
longer and longer to time out, and leakage across the circuit board
becomes a factor.

See
http://www.thesamba.com/vw/forum/viewtopic.php?t=353678&postdays=0&postorder=asc&start=0

Yrs,
d