After the car has been plugged in for awhile, you'll hear the block heater if you listen carefully near the grill. That is the way I tell if my circuit is still holding as I have all 3 plugged into the same outlet. The timer is a great idea. I got one this year for $9 and it turns on at 3 a.m.

Don

__________________
DAILY DRIVERS:
'84 300DT 298k (Aubrey's)
'99.5 Jetta TDI IV 251k (Julie's)
'97 Jetta TDI 127k (Amber's)
'97 Jetta TDI 186k (Matt's)
'96 Passat TDI 237k (Don's
'84 300D 211k Mint (Arne- Undergoing Greasecar Conversion)

SOLD:
'82 240D 229k (Matt's - Converted-300DT w/ 4 speed