Please post the complete Model and Spec. Somebody here can send you a manual and it'll include troubleshooting charts.
I'm with the guys who are saying "not producing voltage" etc. When Cranking (holding in Start), most of its fail-safes are bypassed. Once it's established running, then it starts checking for output, over/voltage, etc. etc. If those checks don't pass, then the Control Module shuts it down.
Spec is important because there are many running changes. For one, the Oil Level Sensor was discontinued at some point in developing the 4KY. Spec tells you that. You don't want to be trying to find the sensor to check it when it might not even be there.
WARNING!!! Over the last couple years, we've noticed several 4KY's failing because of low oil. The oil level really requires attention in these