Hey all. I took my truck into my local firestone today to have the freon checked because a month ago the AC just suddenly stopped working. They put a power probe (edit) on the system to test the compressor and confirmed it was in good shape, they ran dye through the system with no apparent leaks, and had them recharge the system with R134A. They confirmed that the recharge to the proper levels of refrigerant. The technician stated he traced the issue to the A/C Cut Relay but they don't take the dash apart so this is where they stopped - Ok cool. I came home pulled the relay and called the local toyota to order another (It was a weird shape so I couldn't use one from the driver's side kick panel). I attempted to bridge pins 3 and 4 to attempt to see if the AC would start working and to no avail. I have a fluke multimeter (Albeit I'm a novice) and a 1993 Toyota Land Cruiser Electrical Wiring Diagram. If this relay doesn't repair the system it would appear maybe the downstream components labeled A1 - A/C Magnetic Clutch or W4 Water Temp SW could be culprits but there isn't a ton of information here on where those are located. I've got all the tools I need and the patience to measure with the multimeter what is needed to resolve this - Help guide me through troubleshooting this issue.
Additional Information: All the dash lights work including the AC - When the AC is switched on there isn't a change in blower power (Just blowing ambient air). I can't hear the compressor kicking on or a relay clicking. The truck is not overheating and the cooling system was completely overhauled in August/September.
Resources I've used thus far beyond the manuals I own:
AC help desperately needed
A/C Clutch not Engaging
The document shared with me by Firestone of the culprit after testing the system:
What I'm looking at on my current truck:
Additional Information: All the dash lights work including the AC - When the AC is switched on there isn't a change in blower power (Just blowing ambient air). I can't hear the compressor kicking on or a relay clicking. The truck is not overheating and the cooling system was completely overhauled in August/September.
Resources I've used thus far beyond the manuals I own:
AC help desperately needed
A/C Clutch not Engaging
The document shared with me by Firestone of the culprit after testing the system:
What I'm looking at on my current truck:
Last edited: