headlight switch, 6v on 12v?
Postmaster
Joined: Mar 2000
Posts: 3,730
Likes: 13
From: Waynesville, OH
headlight switch, 6v on 12v?
Can't speak for other years for sure, but the '56 horns draw between 9.2 and 9.6 amps. I would bet the numbers are almost the same for most 195x trucks. I just happen to be tuning my horns tonight so I got the book out a couple of days ago.
The 78xx (and 79xx) regulators in a TO-220 case will smoke pretty quick with that much current (9.4 Amps) through them. I've used them intermittently on a good heat sink at about 3 Amps, but they didn't last too long overloaded at twice their absolute maximum rating of 1.5 Amps.
The 78xx (and 79xx) regulators in a TO-220 case will smoke pretty quick with that much current (9.4 Amps) through them. I've used them intermittently on a good heat sink at about 3 Amps, but they didn't last too long overloaded at twice their absolute maximum rating of 1.5 Amps.
Postmaster
Joined: Mar 2000
Posts: 3,730
Likes: 13
From: Waynesville, OH
headlight switch, 6v on 12v?
Oh come on, Larry. You're no more of a knucklehead than any of the rest of us. Matter of fact, my wife says that, being a supreme nucklehead, I'm starting to grow a whole finger or two on top of the old noggin. 
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