sr acalito

Hello everybody! I have a problem with my '92 xlt. Last week i fill the tank full, at the gas station i hear like there's a motor knocking somewhere in the fuel tank, after running around 2 km, the engine stop & never start again, i cannot hear the fuel pump when i switch the key ON. I've read a lot of threads here, very interesting, so i decided to change the fuel pump relay but still the engine won't start. There are 3 relays under the power distribution box, i removed them all just to compare one from the another. This is what i've found: the green (fuel relay) normally open & the coil (two small pins) has 55Ω; the black (don't know what is this relay for) normally closed and the coil has 55Ω, same as green: brown (don't know what this relay for) is normally open but like a diode, there is a risistance of 80Ω, but if you reverse the leads of the tester, it's open. Are these an indications of GOOD relay? Please share your help.. Thanks in advance!

to all the masters of ford explorer, specially '92 XLT... my ac compressor is leaking, so i will change it with a new one.. after i install it, is it ready now for new freon? what type of freon should i use? pls help..