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Re: GM lighting circuits with foglamps (w/o DRL)
Posted to Technical Theory Forum on 3/19/2009

Yup, but the older cars (circa 80's) seem to do it without a BCM or relays.....which is making me wonder how they accomplish it. All I can think of is the headlight switch itself.

I know in the 90's they moved to modules/relays.........so I guess my question... Login to read more.