I have a 1988 Honda Accord LX. The A/C has quit working. I am familiar with general mechanics and have checked the following items. It has 45lbs of pressure on the low side. I bypassed the low pressure switch just to make sure. Nothing changed when I did this. I checked the relay that engages the clutch and it is good. On the inside of the car when I push the A/C button the green light comes on and one of the radiator fans come on. While doing a circuit test I have found the following. There are 4 wires that connect to the clutch relay. The wire (red) from the relay to the clutch is good. The hot wire (yellow w/black stripe) going to the relay has power. There is another wire(also yellow w/black stripe) that also has power, so the 4th wire (yellow) has to be a switched ground to engage the relay. This wire is open when tested. What controls this wire? Is there something else that I need to check? Thanks, Wayne
