Quote:
Originally Posted by Southcity
You mention you have several older cars/trucks but you do not mention what years they are. I'm sure one of the other board members with more knowledge on this can chime in but I believe in 1968 the federal safety laws changed which required sidemarkers/front running lights to be on with the headlights. So prior to 68, some vehicles had park lights/headlights on at the same time, some did not.
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They range from 1946 to 1970 and are not just General Motors. I was aware of the Federal law in 1968. I was just curious if anyone knew if there was a reason for it.