newfrito11

So recently my AC clutch would not engage, causing nasty humid Houston air to be my only option. All controls work fine so I diagnosed the problem to be a small wire between the AC stater coil (giant magnet that snaps the AC clutch plate to the spinning serpentine belt) and the under-hood relay. I ended up replacing the coil as well since i had the part in hand and didn't want to risk it. For two weeks the AC worked perfectly, then out of the blue it went back to old conditions. I did another grounding test and found the same wire (circled red in the pic attached) to be the culprit. What could be causing this small wire to keep going bad? Thanks in advance!

WDPanda

Do you have the correct fuse for the AC?

newfrito11

Never have had to replace the AC fuses so i don't know how i could have the wrong one. Had the car for 8 years. Relays are also looking good.

Jakes_tl

Curious how did you find out it was that wire? Was it broken in between?

jimmyfu

How do you know that it's the compressor/ compressor wire going bad? I don't know if this is the same for the 3G TL, but I'm trying to diagnose an old ML320 AC system and allegedly if there isn't enough refrigerant, the coil will stop activating. Maybe check your refrigerant levels with a manifold gauge to see if you're in spec?