So I’ve been going through my 71 521 here and there and I’m finally getting to the speedometer issue; it doesn’t work.
Ive seen on the form that there is a black cable that goes from the transmission and screws into the back of the speedometer. I have that cable, and the cable
seems to be in working condition.
When I screw this cable into the transmission, and I drive, I don’t see the end of the cable spinning like it’s suppose to. When I screw it into the speedometer,
it obviously doesn’t work either.
What’s going on here?
Since the interior cable isn’t spinning when I drive, is there something wrong with the transmission where I plug it into? I'm guessing the speedometer is purely mechanical, there isnt a ground or power wire that needs to be wire up, right?