AC compressor not running

I forgot to say that I have yet to test the power at the fuse with some kind of load. I will connect straight from the fuse to the clutch for a load test. Will keep fuse in line for protection.

Walt

"Remember that voltage isn't power. It is possible to have 12+ volts on a meter, but not have sufficient power to operate the compressor clutch."

Voltage is pressure, Amperage is flow.

Try to visualize having a wire from the fuse to the freeze switch that is broken except for one tiny strand. That would give exactly the symptoms that you are having.

As Brad pointed out, a poor connection or near-broken wire somewhere between the fuse input and the freeze switch can cause this. The undersized relay that you replaced is by far the most common cause. Check the plugs on the command unit, etc.

You just have to find where you are losing the Amperage, not the Voltage.

A factoid that may or may not be related to your 'small leak- but not the compressor issue.

I'm finding, anectdotally, that the routing of the hard aluminum A/C line is subject to abrasion on 86.5- probably in conjunction with sagging motor mounts. In the attached photo, there is an abrasion mark forward of the passenger side strut tower. On a couple of local cars, the timing guard has rubbed against and chafed through the aluminum A/C line. Fingers crossed that your small leak is less substantial!

Attached files [img]media/attachments/14918=1799-engine compartment pass side.jpg[/img]