My car came with a big 110v AC plug behind the grill and today I figured I'd plug it in. I had always thought that block heaters were just electric blanket deals so I was surprised that mine made noise. It sounded like an electric motor running. The wire just goes into a big plug screwed into the block behind/under the turbo. It was puling some current because the cord was warm after a few minutes.

So how do these things work?

__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD