I have a no start situation on a 1990 C-4 manual. At key up,the
security lite does not display on the IP and you don't hear the fuel
pump prime. Battery voltage is good as well as the starter and
solinoid. I checked the resistance across the key but don't know where
to check down stream to see if the key cylinder is reading the key.
Also would like to check the ign switch before replacing. Any advice
or help is welcome.