Volkszone Forum banner

1 - 2 of 2 Posts

108 Posts
Discussion Starter · #1 ·
Hi - I have recently bought a timer switch for my 412. It's the one built into the clock. It all seems to work but I cannot figure out the wiring. The eberspacher manuals don't seem to help as none have the timer switch details/wiring. I have to connect up terminals B, 15 and 30 on the back of the timer. Can't figure it out. Does anyone know? I want to be able to warm up the car in the mornings before going to work!!!

18,482 Posts

does have an archive of the entire heater manual for just your car:
Click on "Description" will take you to the heater diagram.

There is also a link to BA4 service bulletins.

The last bulletin is about a switch replacement part (no interest)
and has a connection diagram if you scroll to bottom.

There it shows terminal "Z" on the plug connected thru to
the "Clock with heater time switch"...

I'm guessing here a bit, but I believe the purpose is
for the clock timer contact to close, thus feeding +12V
to the "temperature sensor probe" and permitting the
heater to run. That may be the "B" terminal on
your new timer.

Term #30 should go to a "hot all the time" point on your
fuse block. Term #15 may need to be connected into the
heater wiring to fool it into thinking that the manual heater
switch has been turned On.

Sorry this is not a complete answer. But maybe it can get you
started and someone else has more info.
1 - 2 of 2 Posts