66 Mustang - need to find a 12v source

[stangman16]

Hi,

Changing out the EFI harness in my car with the Ford Racing harness and it says to connect to a 12v crank only source. I've done a search for a bit and the only thing I can find is putting it on the "I" on the starter relay (which is a '92 model w/the built in resister or diode..can't remember what it was).

Where can I find a crank only 12v source?

 

[2+2GT]

Hi,

Changing out the EFI harness in my car with the Ford Racing harness and it says to connect to a 12v crank only source. I've done a search for a bit and the only thing I can find is putting it on the "I" on the starter relay (which is a '92 model w/the built in resister or diode..can't remember what it was).

Where can I find a crank only 12v source?

The S terminal would be a better source. The I terminal gets partial voltage feedback when the ignition is "ON". The S only has power when the key is in the "START" position.

 

[stangman16]

The S terminal would be a better source. The I terminal gets partial voltage feedback when the ignition is "ON". The S only has power when the key is in the "START" position.

Sounds good - thank you!