lose 12v and it dont come back

i have a 94 dodge 1500 360 i replaced the timing chain in it because it jumped time. i get the first of the 12v to my coil when i first turn on the key but when i crank the motor over it never comes back to send spark to distributor so im not getting fire to my plugs. can someone help on troubleshooting this problem on how to get my 12v back when cranking

Years ago there was a wire from the starter to the distributor for cranking voltage.