H4 Headlight Wiring

[rob hod]

  Interesting,

    When I relayed my lights a while back, I only got as far as doing the
main beams. I used a schematic from Huw's site (thanks Huw), which in my
interpretation used one side of the old supply as the solenoid trigger feed.
The other side I just disconnected as of course I had a new super direct
supply from the switched side of the relay.

   Now as far as I know my autocheck is fully operational, - (Isn't it nice
to know the *exact* moment your brake light gives up? I always used to think
they did it late at night when no one was looking..) but it seems that it
can live with the tiny amount of current drawn by the relay coil on one the
side, compared to zilch on the disconnected side, and still not register a
'failure'.

 Is this not the case with later cars?

 Cheers,

rob
>
> Message: 11
> Date: Fri, 19 Sep 2003 14:26:27 -0400
> From: Huw Powell <audi at humanspeakers.com>
> Reply-To: audi at humanspeakers.com
> To: Doug Johnson <ur-quattro at msn.com>
> Cc: Rennlist 20v <audi20v at rennlist.org>,
> q-list <quattro at audifans.com>
> Subject: Re: H4 Headlight Wiring
>
>
> > I'd like to maintain the autocheck function, so me thinks I'll go with
four
> > relays.
>
> To do that, the wiring will be more complicated, as the actual
> current-carrying wires to the bulbs must pass through the autocheck
> unit.  Which means either doubling them back to the unit from the
> relays, or moving the unit to a different phycial location (say, near
> the relays) and running a signal wire back from it to the original
> socket area.
>
> Most of us just figure we can tell when a headlight is out by looking
> forward through the windsheild after dark, with the lights turned on, so
> we don't worry about maintaining that autocheck function.
>
> --
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/
>