a/c hvac controls not working no light when blower activated

[roni-wan]

got a new compressor
got the system washed and recharged with freon
got a working accu
All fuses are OK

when turn the blower switch on the hvac controls to turn on the a/c nothing happens, just starts blowing air the compressor doesn´t kick in and the green light for a/c doesn´t come up


If I give 12v from external source to a pair of wires that goes to the accu green led comes in and a/c starts working, later will post the color of the wires

If anyone could help will appreciate a lot

 

[luv2rallye]

Either your 10A "heater relay" fuse is blown or you have a defective blower switch (which has a second circuit in it to power AC power).

 

[roni-wan]

thanks for helping

10A fuse its OK every fuse its ok double checked

the blower its working coz i´m getting air flow on my vents

where its the second unit you talk about?

 

[luv2rallye]

Not a 2nd unit - the blower switch itself is a 2 pole 5 throw switch. The second pole connects the blue/red wire to the white/black when the switch is in any non-off position. This provides power to the A/C switch which supplies the accu.

 

[roni-wan]

so maybe the hvac controls are shot?

 

[luv2rallye]

Sounds like the blower switch is bad. If you measure +12V on it's blue/red wire with ignition key on (engine doesn't have to be running), but not on it's white/black with the blower switch in a not off position, then the switch is bad.
Alternatively you could unplug the switch and connect an ohmmeter across the switch side connector pins (that will plug into those wire colors on the harness side connector). You should read near 0 ohms when switch is in a non off position.
Or you could use a small battery and light on those pins if you don't have an ohmmeter.