Ihave a 2011 equinox. The ac panel stoped working. I checked all fuses inside and out. Is there a relay thac controls this?

SOURCE: Relay center location

Finally located the AC primary small relay in the relay center under the right dashboard site. The relay had burned winding and only the resistor connected parallel to the coil was showing some resistance otherwise it wasn't engaging when I applied power to it. The Buick is actually 1990.

SOURCE: ac compressor wont go on

ac compresor relay diagram/scamatic

SOURCE: AIR CONDITIONING

Well my a/c spopped working to,was told it was themegentic clutch switch that work the compressor,might have to replace a/c compressor

SOURCE: fuse for locks constantly blows

Try replacing the relay. Clean the socket of the relay and fuse

SOURCE: 1991 Sierra GMC AC control problem

The follwing is a cut and paste from a service bulletin:

Bulletin No.: 461202

Date: May, 1994

SUBJECT:
A/C CONTROL HEAD FLASHES OR ERRATIC OPERATION OF A/C CONTROLS (POLISH
TERMINALS)

MODELS:
1988-94 CHEVROLET AND GMC TRUCK C/K MODELS
1990-94 CHEVROLET AND GMC TRUCK TOPKICK/KODIAK MODELS WITH C60 OR C69 AIR
CONDITIONING

CONDITION:

A/C Control Head flashes, performs erratically or malfunctions.

CAUSE:

Light surface corrosion on the Control Head terminals.

CORRECTION:

Remove the A/C Control Head and while holding the unit with the terminal
cavity down (toward the floor) so no particles will fall inside on the
circuit boards, polish the terminals on both sides of the cavity with a lead
pencil pink eraser. Do not use an ink eraser or other abrasive such as a
small wire brush or sandpaper, etc. Doing so will remove the terminal
coating and degrade the contact surface.

Performing this procedure, in many cases, will make replacing the Control
Head unnecessary. Using this procedure in conjunction with the A/C circuit
diagnosis found in the Electrical Diagnosis Manual and especially before
replacing a Control Head for any reason is recommended.

After polishing the Control Head terminals, but before reconnecting, check
for proper terminal contact as described in the applicable electrical
diagnosis manual. If contact is good, apply dielectric grease (P/N 12345579)
to the harness connector terminals. Please do not apply grease to the
Control Head.