I have a 1998 dodge ram 1500 the ac compressor will not engage ac has been charged and there also isn’t any power going to the hi low pressure switch be fore I take the engine harness out and try and find a shop to fix it I was hope some of the doge guys here could help me in a last ditch effort

 

Have you checked the fuses and/or relay to see if one might be blown/bad that's controlling the power to the HVAC compressor/switch?

 

It’s electrical I just don’t know what to do

 

Ok, so I'm not sure what truck you're dealing with but the 2001 schematic I have shows fuse 12 and J for the A/C clutch circuits J provided the power for the clutch, 12 provides power for the relay control which is controlled by the PCM. The PCM will activate the relay based on the switch status. On this schematic the PCM supplies power to the low side switch, then the high side switch. Looking at your picture you are testing the high side switch, which will not get power if the low side switch has an open circuit. So I would navigate to the low side switch, assuming you have charged the A/C and verify it is connected. If it is then I would disconnect the switch and install a paper clip in the contact to test is you now have power to the high side switch. This would also assume you are selecting A/C on the dash controls

 

What do the switches look like I’ve only been able to find the one on the dryer

 

I apologize I looked at your picture wrong. I saw your loose connector and the cover on the A/C line assuming that was the switch, I see now it is not. the drier would be low side I believe.

Also this might require help from someone who better understands these specific systems. I cant say the PCM is actually putting 12v out on the switches or if its just looking for a path to ground where you may not find any power to test. The circuit runs PCM to low side to high side, to dash switch to ground.

I would start with installing a jumper wire in the switch you have found and verify if the A/C relay clicks

 

The relay does click on the outside fuse panel ac compressor does engage probably should get another switch for the other side

 

I'm confused by your question, if the clutch is working, what is your issue?

 

Where are the preasure sensors located because I only know of 1 on the dryer

 

If the clutch is working I would not be concerned about the switches?