[s-cars] High beams stay on after relaying

[Wayne Dohnal]

Vincent,

Do you have a Canadian S-car?  As part of a quick-and-dirty kludge to add
the DRLs, the wiring relies on the filaments of the hibeam bulbs to ground
one side of the fog light relay.  When the hibeams are off the fog light
relay activates if +12 is on the other side of its coil.  When you turn on
the hibeams, the side of the fog light coil connected to them goes to +12
and the fog light relay drops out.  So when your lobeams are on, your new
hibeam relay coil is partially powered, in series with the fog light relay
coil.  It's not enough power to activate it, but it's enough to keep it
latched once you activate it by tuning on the hibeams yourself.  Having an
American s-car I didn't need to solve the problem, so I'll leave the
solution to others.

I'm wondering, what relay, and how many, are used in your harness for the
hibeams?  I built a harness using a single 40 amp Bosch relay for both
hibeams, and I have my own latching problem because the contacts
occasionally become welded together.

Wayne Dohnal
1994 S4

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Hi all,

Today was headlights day for my urS6: lens cleaning, 9005 for low beams
(not installed yet, I have trouble removing the two pegs in the plug)
and relays. Everything goes well and the improvement is really worth the
trouble but I still have a little glitch. The high beams stay on. I can
switch them off by switching off the headlights but they won't turn off
just with the high beam/low beam switch. I've seen this issue mentioned
in the Euro Supernova article from Igor on www.urs4.com but there is no
fix in the article. Usually, this is due to a current leak and can be
solved by a resistance charge in parallel with the relay coil but I
though I'd rather ask the list before adding something else in the
already crowded passenger headlight enclosure.

BTW, I've not deleted the light check yet. Can it be related?



Vincent.