A/C compressor not engaging

[Sanchez109]

I have a 1997 Silverado that has a new compressor and accumulator that I just finished installing. The low and high side switches have no power going to them, jumping them does nothing. I can hear the relay clicking on, I even put a relay in without a cover and watched it (the relay) engage. I have a new fuse under the hood, what's my next step?

 

[JOHNGAAA1]

Jump out the pressure switch on the drier and see if the clutch engages.

 

[Sanchez109]

Jump out the pressure switch on the drier and see if the clutch engages.

I've jumped the switch on the dryer and the switch on the high pressure side of the compressor

 

[JOHNGAAA1]

Ok. Did you check fuse #12 on the side of the dash inside?

 

[Sanchez109]

Ok. Did you check fuse #12 on the side of the dash inside?

I put a new one in and it didn't change anything. The old one looked a little burnt, but not obviously blown

 

[Paolo has a K1500]

Is there any refrigerant in the system? My understanding is that the compressor won't engage without some amount of charge. I'm bringing my AC system (that has not blown cold air in the 8 years I've owned it( back to life and heard this advise from an experienced mechanic.

 

[xXxPARAGONxXx]

I have a 1997 Silverado that has a new compressor and accumulator that I just finished installing. The low and high side switches have no power going to them, jumping them does nothing. I can hear the relay clicking on, I even put a relay in without a cover and watched it (the relay) engage. I have a new fuse under the hood, what's my next step?

Did you check the gap on the compressor clutch? Do not make the mistake of thinking it is properly gapped out of the box.