12V cranking tap point
 

All,
I just got finished pulling the ZZ502 out of the 74 and installed the 454. Having starting issues that are driving me nuts. First the starter operates fine, it is a high torque mini starter that I had on the ZZ502. There is a relay on the "S" terminal of the starter and the relay connects to the "+" side of the coil to provide 12V during cranking. I am only getting 8V during cranking now for some reason. I got lucky with the cam break in as once I let the ignition switch go to run the engine ran. I have a connection coming from the "ACC" terminal on the fuse box that provides the 12V in the run position. Tired of trying to determine why I only have 8V during cranking. All connections look good. Is there somewhere I can get 12V from during cranking? Was wondering if the "IGN" terminal can provide this. If it does I can simply move the ACC connection over to the IGN terminal. Hope this makes sense. Thanks

The IGN normally provides full battery voltage.

Have you got a picture or a wiring diagram of that setup? That's something different from anything I've seen.

Acc does not have power while cranking, only when the key is on or in acc, but not start. Ign has power in on and start.

Here you go-


https://cimg9.ibsrv.net/gimg/www.cor...123adf7d11.png