Yes I did a search on this, but none of the results mentioned anything about these looking different inside. I have read that they all are interchangeable or that the fuel pump relay is different. All of mine are different so I dont know if they are interchangeable. Can someone hlp clarify what ones are interchangeable and why mine are different inside?
MY CAR IS A 86 TPI AUTOMATIC relays are located on drivers side firewall

I am not 100% sure what is what. all 3 have the same style connector so they can get mixed up easy. The car runs when I switch connectors around, so that does not help. Can anyone tell me what these are, choices are:

MASS AIRFLOW SENSOR POWER RELAY

MASS AIRFLOW SENSOR BURN OFF RELAY

FUEL PUMP RELAY

Here is the first mystery relay, lets call it #(1)it has no markings or part numbers on it. It has a little resistor thingie in the middle

 

Lets call this #(2) It also has a resistor thingie and has the markings LF on it and the numbers 7166 and 4078907

 

here is #(3) it does not have a resistor thingie on it. It has LF on it and the number 9025