A/C questions 99 tahoe

[slipping]

Air not blowing cold. I bought a recharge kit but no suck from can because compressor wouldn't kick on. Did paperclip to plug against passenger side wall and noticed the draw like it wanted to go but I didn't hear any click over. Does this say the compressor needs changed? If so that, drier, orafice, hoses all I need? How much would shop charge verses me doing with. Thanks all.

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99 4 door Hoe lifted
04 Hoe stock
94 z28 lowered, being referbished

 

[SunlitComet]

What draw? amperage? did you actually test for volts on the a/c clutch? better yet what plug did you try jumping specifically? even better how did all this start?

 

[slipping]

What draw? amperage? did you actually test for volts on the a/c clutch? better yet what plug did you try jumping specifically? even better how did all this start?

OK. I bought truck a month or so ago and just tried to use air. Turn on and blows warm air. Got my little AC pressure hose and it read low. Got a can of fill, hooked it up and it wouldn't take any from the can. Turned car off, let set a few mind, turned on car then AC to see if compressor would turn on. A buddy said to paper clip wire harness in pic and I did. Im not too savy on knowing what settings to look at on the volt meter nor which plugs/wires to check (haven't got that far in class at work). The draw I was talking about was when I paper clip, the engine revs a little, air sucks in the intake, and then engine drops back down. No audible click from compressor

___________________________
99 4 door Hoe lifted
04 Hoe stock
94 z28 lowered, being referbished

 

[SunlitComet]

check for 12+v at compressor clutch connector when you turn the system on. if not test the relay and compressor fuse in the power box near the firewall.

 

[gpracer1]

If you aren't at least familiar with ac , I would recommend letting a pro handle it for a speedier more accurate fix.

 

[letsbangout]

If you aren't at least familiar with ac , I would recommend letting a pro handle it for a speedier more accurate fix.

+1.

I can't tell what you're "paper clipping" because the picture you sent doesn't show a paper clip. Hopefully it was to the low side cycling switch and not something else. If you heard the motor rev a little, it could be because the computer thinks the compressor was commanded on and gave the idle air system a few more rpms - which is the expected behavior. But yeah, the air systems we have in these trucks are unforgiving and unless you absolutely can't afford a professional and are willing to do a ton of reading, it's probably best to seek a pro. I've done lots of "trial and error" myself over the course of many years, and I'm still not sure the error was worth the cost of the trial.

 

[slipping]

OK thanks guys. Ill take it down to the shop. I did check volt at compressor plug and did not get
A reading.
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99 4 door Hoe lifted
04 Hoe stock
94 z28 lowered, being referbished

 

[retorq]

The compressor won't kick on with low pressure and the compressor isn't +12v all the time, only when the compressor is running.

 

[992dr]

If you aren't at least familiar with ac , I would recommend letting a pro handle it for a speedier more accurate fix.

What he said.