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echo: electronics
to: Robert Mcginity
from: MIKE ROSS
date: 2004-11-03 10:30:26
subject: Looking for a schematic

"Robert Mcginity" bravely wrote to "All" (02 Nov 04  20:25:31)
 --- on the heady topic of "Looking for a schematic"

 RM> This may sound strange, but I am looking for a schematic of a daytime
 RM> running lights module (home built one).  I had seen one in a magazine
 RM> a LONG  time ago, but I cannot seem to locate one.  Any help would be
 RM> appreciated.

Daytime lights are often run in series. Normal car lights typically
had a relay feeding battery power through a couple of fuses and a
filament selector switch on the ground legs. In such a system, you
need to open the common ground leg of the low beam filaments. Then
connect one lamp's hot to ground and the other lamp's hot to the
battery (through a least one fuse). Finally some logic to switch it
back to normal when the main lights are activated. It would require a
3PDT 10 to 20 amp relay and other bits for the logic. There may be a
retrofit kit from the car maker though. Ask around.

 M*i*k*e

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