Getting factory A/C to work in 71 Skylark

[eagleguy]

Just had the A/C clutch replaced on my 134A converted system. After working fine for a bit system won't engage. No blown fuses, but a check shows no current going to unit (green and black wire conections). Odd thing is that :Do No: :Do No: just the other day system worked fine again then crapped out for the second time. Car has all orginal wiring with no mods. Any ideas???

[70aqua_custom]

The selector switch, at the heat/ac controls in the dash, needs to close to direct power to the clutch. My selector switch has an intermittent problem right now. I can wiggle the switch and the clutch will energize. There could also be loose connections there or at blower switch.

[Steve Craig]

Clutch is energized by a switch on the dash heater control panel, switch on the left. Two wire connection point, possible it's come loose?
Electric clutch drive faceplate requires a clearance of 1/32" to 1/16".
Check it's position when switch off, it should move in a bit when switch on & engage the pulley rotating the compressor. No movement make sure you have a good ground to the upper support bracket with the black wire.
Check also the AC harness as it comes from the dash. Connector there as well with a relay.
A chassis manual is money well spent if you have access to one.

[eagleguy]

Thanks for the ideas!!!

[rmstg2]

There might be a safety switch that won't let it come on if the pressure is too low.:Do No:
Bob H.

[eagleguy]

Still can't get power to the A/C unit. Any other ideas. Everything looks and test fine.

[70aqua_custom]

use a volt meter or a test light and work your way from the fuse to the compressor. Please post what you find. :TU:

[12lives]

Does the 71 have a fuseible (sp??) link on the clutch circuit? It can blow if there is an overload. Look for it near the compressor.

- Bill