Hey fellas! I'm working on a TPI swap in my truck, but I've gotten to a bit of a stumbling point here. Are fuel pump, MAF burn-off and MAF power relays all the same relay? And can you interchange them with different relays from different years of vehicles (aka, I noticed that the later year cars all use the same roundish relay for all three, while the earlier years all had square relays) I've got three wiring plug ends, one that is from a newer vehicle, and two from the older ones. I've got a whole bunch of the three different types of relays here, so other than the lack of pig tails, I can go with either type... Thanks for your help on a question that has probally been asked a billion times! Russ

Never mind, I just cracked a couple open to see how they worked, then realized that they are all infact the same relay, regardless of the shape and or size.

Just for anyone who does another search on this subject and pulls this topic up: All of the relays from various years will interchange. For the MAF Burn-off relay, simply don't hook pole D up to anything (pull its spade out of the male connector). Pole D is normally closed in the relay, and you don't need it.