73 valiant no spark from coil

Could be anywhere in the circuit path I mentioned, you must actually check it. Could be a COMBINATION of bad connections.

If the battery reads 11 when cranking that is not too bad. There should not be that much difference. Get this picture in your head. Re---read the circuit path and keep that "map" in your mind:

From battery........fuse link.........through bulkhead connector..........to ammeter........through ammeter..........to ignition switch connector...........through switch........back out switch connector.........back out bulkhead connector..........to ignition system

An easy way to check this is to "rig" an extension wire if need be.........Go to Radio Shack and get a baggie of clip leads. Clip one lead of your meter to the battery positive, like the starter relay stud

Now take the other probe with the key "in run" and check some of the points you can access on that circuit path. Check the bulkhead where the "ignition run" wire comes through the firewall on the inboard side. YES it is a beaouach to get to. An easy place to check is right at the ignition switch connector.

There are two ways to check

1------with the meter set up as above, with one probe on battery positive, you are DIRECTLY READING the difference in voltage. You are looking for a very low voltage, the lower the better. When you check the different points in the circuit path, this will show up as the drop reading changes. Ideally you want NO MORE than .3V..........three tenths of one volt

2.........with one meter probe GROUNDED and as you check each point along the path, the voltage will change. You will have to measure battery voltage and SUBTRACT the two readings to give you the difference. Just like in 1 above, no more than .3V