H4 Headlight Wiring

[Henry A Harper III]

The autocheck system only monitors the dipped ("low") beams, not the main
("high") beams, so you have the best of both worlds? Unless you want to relay
the dipped beams, that's what causes problems with the autocheck.

HTH
Henry Harper
http://www.henry-harper.com hah at alumni.rice.edu
1991 200 quattro, 119.9k, relayed eurolights and no autocheck
1988 GTI 16v, 237k, relayed eurolights and never had autocheck (driver must pay
attention instead ;) )

On Saturday, September 20, 2003 3:08 AM, rob hod [SMTP:rob3 at hod3.fsnet.co.uk]
wrote:
>   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?
>