The Most Devastating Engineering Miscue Found in Early A-Bodies

Thanks, I don't have that wiring diagram. So the park lamps are connected to the tail lamp circuit. Makes sense because it keeps current load off the headlight contact and shares power with the low current tail light draw. I must say though, that my original harness for the headlight switch does not do this, instead, it's the same as the factory manual, with the parking lamps on P. I'm thinking this change may have happened after my car was built (12/14/64), and early Barracudas didn't have this connection. Park lights would only come on when the switch was pulled out half-way.

Interesting. My 65 Barracuda was built December 4, 1964 (in St. Louis) and its parking lights have always come on with the headlights. I have always assumed that all 65 Barracudas were the same way, but as I've found out with other cars I've owned, just because my car is a certain way doesn't mean that's true of all cars of the exact same model equipped in pretty much the same way and maybe even built in the same plant at about the same time.