Ignition switch issues

[yoshi]

I'm trying to get my truck started, everything except the bodywork isn't original. The engine is an SBC350 from a 78 Impala & a 4 position ignition switch. I've just fitted an EZ wiring loom. The starter will turn when I turn the key to the 2nd position but I don't have 12v at the electric pump. The only wire that has 12v at the switch is the starter. This comes from the solenoid which is on the same terminal as the main + from the battery.