Great Product that isn't available anywhere else.
Looked all over for a wiring diagram for my 39 Packard. The factory owner's manual has one and so does one of the Packard websites. The factory manual is extremely hard to read and very tiney. It can't be enlarged well either. The other diagram is good but not colored which makes it hard to trace out the circuits.
This wiring diagram because it is larger is easier to read and you can follow the circuit easily because they use the factory color code for the individual wires. Now if they would only have included all the switch and relay functionality diagrams it would be perfect. Price is right for what you get.