Randolph wrote:
> remove wrote:
>
>
>>relay...doesn't. I don't have a wiring diagram, Is there anything
>>between the coil ground pin of the relay and the switch on the
>>instrument panel?
>
>
> Yes. The relay coil ground pin is connected to the ECU. When the ECU
> gets a request for A/C, it will delay turning on the relay while it
> enriches the air/fuel mixture a bit. The A/C request comes to the ECU
> through the A/C pressure switch, the A/C thermostat at the evaporator,
> the A/C main switch and the ventilation fan switch.
>
>
>>Isuspect the switch. If I had the pinout for the
>>switch I can troubleshoot from there. Can anyone provide this
>>information? IIRC there are 5 pins on the switch.
>
>
> That's a lot of pins, don't recall it having that many. Are you sure
> this is an OEM Honda A/C? I once had a Civic where the dealer had
> installed an after-market A/C.
>
>
>>I've got 1 pin with
>>switched power and 1 ground for sure. I imagine 1 is for the
>>illumination of the switch. That leaves 2 unknown terminals.Any input
>>would be appreciated.
>> Thanks, Tom
>
>
> You can find the wiring diagram at
> http://www.honda.co.uk/owner/civicmanual/pdf/22-6.pdf. This wiring
> diagram is for the European Civic, but it is identical to the US version
> with three minor exceptions:
>
> 1. Ground for the condenser fan goes to ground location G751 (EU: 701)
>
> 2. Thermal protector for the compressor is shown as a separate item in
> the above referenced schematic. In the US schematic it is not shown, but
> it is still installed in the car (internal to the compressor)
>
> 3. The A/C on indicator in the EU schematic is shown as a simple light
> bulb. In the US variety it is shown as an LED connected through a
> dimming circuit.
>
> I have compared the above referenced .pdf with the wiring diagram in the
> Helm manual for my '94 Civic, and find only the above mentioned
> discrepancies. Wire colors, fuse numbers and ratings etc. match.
>
> A couple of trouble shooting tips: If the A/C-on indicator does not turn
> on, the problem is in the A/C main switch, or, more likely, in the
> ventilation fan switch.
>
> If the condenser fan comes on but the compressor does not, the most
> likely problem is the A/C pressure switch. It could be a faulty pressure
> switch, or improper pressure in the system. I do not know if this is a
> high pressure lockout or a low pressure lockout. I have seen both on
> various cars.

Hey, Thank you very much. That is exactly what I needed. The AC switch
was indeed defective.