Points operation in Volvo 4 cylinder dist.
Just snapped a shot of a Volvo distributor to show the spade connection on the side . The spade connection "MUST" be insulated from the body of the distributor and connects inside to a black wire which is connected to the moving arm of the points .
The moving arm of the points are insulated at the pivot with a nylon bush. When the points close the coil builds up a charge and then when the points open the field coils collapse in the coil and fire a 30k volt spark out of the coil top to the dist. cap centre . Points are basically a ground switch
The fixed arm of the points are earthed to the base of the distributor.
If you connect a positive wire to the side of the distributor you will fry stuff from that point back through the wiring.
Last edited by 67Mustang Al.; 06-26-2012 at 06:03 AM.