A/C amp issues

[motaratak]

I have a 1992 Suzuki Sidekick 4dr auto 16v, turbo. I cant seem to get the A/C compressor to engage, it used to work. Did an engine change prior to the turbo, new head and block, hasn't worked since.

I back probed the A/C amp and I'm getting 12V coming OUT of the amp at the yellow/blue and 12V going IN yellow/black wire.

Is there something in between the engine over heat A/C switch and the a/c amp?

[fixkick]

as seem here 95 , schematic.
http://www.fixkick.com/air-conditioning.html

yell/blue is overheat switch engine , 0v is good not ever 12vdc, so if the engine is not stock the switch is missing, so ground this wire.
besides fuses, relays and wires.bad.
hi-low switch.

the pink wire pulls in the compressor relay/

[motaratak]

I understand it is ths overheat switch but why is the amp send a 12v signal out on the yellow/blue wire? Its a 16v 1.6 with all of the sensors and switches inplace, its all still there.

[motaratak]

Found the problem. Yellow/blue wire does not have continuity from the switch to the A/C amp.

[motaratak]

It was the connector at the switch, fully functional now

[fixkick]

oops that would do it.
easy fix. no make the amp happy and the hi/low happy and clutch pulls in, glad to hear running !!!!