can a 5 pin relay be used like a four pin just dont use the 87b prong

 

yep can do

 

More confirmation, yes it can. And the prong that you don't use is called the 87a prong

This diagram might help, ignore the rest of the crap and just look at the relays:


This diagram is using 5 prong relays to function as 4 prong relays. You can see that the resting position (no power to the inductive circuit) is for the power to go to the 87a pin. When power is applied to the inductive circuit (85 and 96 pins) then the switch closes to the 87 pin and send power Whatever component you are hooking up, it will hook up to the 87 pin.

Whatcha workin' on?

 

i usaly use 4 prong but the 5 prong are easier to find at the salvage yards. im using them for fog lights. lots of fog lights

 

Neato! Pics or it didn't happen (of course)