Wow, Lester, what a pessimist!
I had a similar issue on my Dodge Neon and bypassed the relay to make it
run. In my case, it did, but the fix wasn't simple. Turns out a
pressure switch near the compressor was faulty. I had the dealer
replace it, and it works fine now. But my advice is that simply
bypassing the relay does not necessarily tell you it's bad. You can
remove the relay and energize it on the bench and see if it clicks, and
see if the contacts close with a meter or test light.
As far as old systems never working well, I converted my 1986 Mustang
over to the new refrigerant and had the dealer finalize that for me,
too. Works great, I guess as long as you can find competent help. I'm
fortunate that I did.
Lester Ewing wrote:
> You can always bypass the relay with 12v and a jumper wire.. of
> course there are also several safety switches in newer A/C systems
> like overpressure switches that will keep it from running. Check
> voltage at the compressor and if there is none put 12v to it and see
> if it "clicks". No need for it to be running for this. After you
> are sure that it isn't simple, be prepared for it to never work well
> again.. that is assuming that you take it into the dealer.. ;-)
>
> Lester
>
>
> On Jun 17, 2006, at 8:15 AM, Chris King wrote:
>
>> Listers,
>>
>> Anyone know how to check a relay? The A/C on my 2000 ford Ranger is not
>> working because the compressor is not engaging. The refrigerant
>> level is
>> OK (I have one of those nifty cans with the gauges on it). I'd like to
>> make sure it's not something simple before I bring the truck into the
>> shop. Fuses are fine, but there's one relay for the A/C listed, and I'd
>> like to check if it's good or not.
>>
>> Thanks.
>>
>> -=Chris
>> Chris King
>> http://home.comcast.net/~kvcbk/
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