I am working on a1965 gmc that had a v-6 in it have changed over to 350 small block my ignition switch has 4 prongs the marking on the prongs are as follow
BAt
ING
ACC
D-R
using a ohm meter when I turn the key to 1st postion all 4 prongs I get a reading when I move the key to what I thing is the start the ING prong drops out and I get no ohm reading on it but I do get a reading on the other prongs which wire should I use for the start selnoid for the started is there any where I can get a wiring digrham


Bob May