[s-cars] Daytime running light info needed (Canadian DRL)

Dave Ellis UrS4 at sympatico.ca
Wed Feb 16 16:50:40 EST 2005


So reading the "fog lamps w/o low beams" thread got me thinking.  

I'm about to begin wiring in relays for the low and high beams and 
install the HIR lamps from Daniel Stern.  Rather than having the DRL 
feature triggering the low beams to come on whenever the car is running 
(and thereby "using up" the somewhat pricey HIR bulbs needlessly), I 
was hoping to figure out an alternative solution.

So does anyone have a diagram or info that shows the operation of the 
DRL feature in Canadian S-cars?  Is there an easy way to disable the 
DRL feature and/or re-wire it to trigger the fog lamps instead? 

It would be preferably to have the low beams opoerated in DRL mode at 
the reduced wattage the DRL feature now send to the low beams, or to 
find a way to safely send the reduced DRL voltage to the HIR low beams 
bypassing the relays when in "DRL mode".  

Since the stock DRL feature will just trigger the soon-to-be-installed 
low beam relay, the DRL will no longer function at a reduced wattage 
and will force the low beams to be on a "full power" all the time.  I'm 
guessing the original idea of sending a lower voltage to the low beams 
in DRL mode was to extend lamp life and to reduce electrical load 
somewhat.  Since I have to keep the DRL feature by law where I am, I'm 
looking for a reasonable alternative to running the new HIR bulbs when 
ever I'm driving weather they're needed or not.

Right now in my Canadian model '93 S4, the exterior lamp control stalk 
off the steering column has three positions:
  -bottom position: no exterior lights except DRL which
   is the low beams run at a reduced wattage.
  -middle position: parking/corner lamps and DRL on.
  -top position: parking/corner lamps and low beams on
   at full wattage.

I'd like to keep this or similar operation if I can since it's unlikely 
my wife would ever remember to actually hit a seperate switch to turn 
on the DRL.

Thanks!

Dave
'93 S4
'99.5 A4 1.8t

 


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