What can cause your 1972 Dodge D100 to not fire when turning over?

Answer 1

is it points or electronic. if points check gap and make sure they brake. if they do then get your volt meter and check from the negative side of the coil(with the point open)to see if there is still a path to ground if there is find and remove it. also check to see if the coil is fried. there should be no continuity between the positive input on the coil and the spark output. if it is electronic the magnetic pickup in the distributor may be bad. remove it from the coil and and check to see if it grounds or never grounds while someone else cranks the engine or an easier method is to put an amp meter around the positive wire to coil and check how many you draw while cranking if none or continual than the unit is bad or you might have a short in another part of the truck often the charging system is it points or electronic. if points check gap and make sure they brake. if they do then get your volt meter and check from the negative side of the coil(with the point open)to see if there is still a path to ground if there is find and remove it. also check to see if the coil is fried. there should be no continuity between the positive input on the coil and the spark output. if it is electronic the magnetic pickup in the distributor may be bad. remove it from the coil and and check to see if it grounds or never grounds while someone else cranks the engine or an easier method is to put an amp meter around the positive wire to coil and check how many you draw while cranking if none or continual than the unit is bad or you might have a short in another part of the truck often the charging system