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Kenny Sellers
Dodge Dakota
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8/23/2005
20:54:35
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 Subject: A/C cycling pressure switch
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Message:
Hey ya.......I have a 1989 Dodge Dakota 3.9/2WD and CANNOT find the a/c cycling pressure switch. It is a pretty big part so maybe it is behind the dash? Any help would be appreciated.
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Luke
Dodge Dakota
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8/23/2005
21:24:31
| RE: A/C cycling pressure switch
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Message:
I may be wrong but I believe there is a pressure switch built into
the expansion valve.
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Dan M
Dodge Dakota
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8/24/2005
06:37:24
| RE: A/C cycling pressure switch
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Message:
Check the accumulator where the electrical connection is.
- Dan M
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Kenny Sellers
Dodge Dakota
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8/24/2005
20:31:46
| RE: A/C cycling pressure switch
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Message:
Thanks for the reply..it is not on the accumulator or expansion valve. There is an a/c cutoff switch(small) but no "cycling switch". The part Advantage sold me appears to be the cycling switch for a 1989 Dodge Dakota that has had the R12 system COMPLETELY removed and replaced with a R134 system. Here is a link to the cycling switch...http://www.rockauto.com/ref/ACDelco/Detail.html?15-5862.jpg As you can see, that part fits nowhere on the 1989 Dodge Dakota. The reason I began a search for a cycling switch is because a/c system is fully charged but the compressor only kicks on for 4 seconds and then stops. About 30 seconds later it kicks on again. Connecting the compressor directly to the batter results in compressor
"turning" smoothly(but with no cold). Is there some other switch that I need to check out? Thanks for the help.
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Joe M.
Dodge Dakota
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8/24/2005
21:24:32
|  RE: A/C cycling pressure switch
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Message:
you could also be low or refrig. and/or oil
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Dan M
Dodge Dakota
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8/24/2005
22:49:28
| RE: A/C cycling pressure switch
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Message:
completly charged meaning? Did you hook up a pressure guage? When I replaced my evaporator core and went to charge the system, it registered 2 differnet pressures depending on when the compressor was engaged or not. When the compressor engaged, it would drop low and when it kicked off it would register high. I added until it was in the 30-35 psi range with compressor running. It was easy to tell since the compressor would stay running.
- Dan M
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