hooking up aux reverse lights
Good point. Ford also uses that ID system on the half size ISO relays for some reason

I don't know if what you are talking about ( maybe a Blazer relay from Autozone ? ) uses the same pin assignments as the Ford half ISO relay. diagram is on the side of it ( or should be ).
Notice Ford uses 4 as the Normally Closed terminal, this is where the others could be different.

I don't know if what you are talking about ( maybe a Blazer relay from Autozone ? ) uses the same pin assignments as the Ford half ISO relay. diagram is on the side of it ( or should be ).
Notice Ford uses 4 as the Normally Closed terminal, this is where the others could be different.



