Okay. I have a 1998 lt blazer 4x4, with junk yard AC compressor issues. I ripped out the JY AC compressor and replaced it with a new one, however it did not come with a low pressure switch. I tried getting my old switch out but it just broke apart. I got a new switch in and it's the wrong fitment to the wire, it has 2 connectors inside BUT. (Hope this makes sense) The outside pins to hold the connector are at 90°. My OLD switch has 2 pins with the outer clips at maybe 120° offset ... The old AC compressor has one big hole where the switch goes for fluid where the NEW AC has 1 small hole, the new switch as well has 2 small holes... Do I have to line the holes up? Could the truck wiring be different from the Switch? I'm getting a new switch today but can't do the change till Friday.
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This is the new pump that I got. Is this for an older blazer? Maybe mine was some sort of 1998.5 where they changed something for later models? I'm so lost...

 

Can you post pictures of the electrical connections? That would help quite a bit and allow others to compare what they have to what you have.

 

Yes sir. Like stated the OEM switch is gone. I will show what the plug on the truck looks like even though it's broken

 

This is the plug from the truck. Where it is broken off at is where the NEW switch wants to put the guide fin. OEM pin was down to the bottom left of the picture.

With the Switch in the pump it is hard to see. It fits to the OEM truck but has the fin at 90° from the top clip which broke my very brittle OEM connection.