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#1
04-27-2014, 06:26 PM
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1984 300D AC Compressor Delayed Engagement
Hey guys so my buddy recently got a real nice 84 300D and while helping repair a few things i ran into something i have not seen before.
When i turn the AC on the blower comes on and all the proper vents open however the compressor isnt on. If you wait 5 min, and sometimes almost 15 min the compressor will kick on. I have jumped the pressure switch, still won't come on, jumped the ETR under the dash and made no difference, swapped the push button unit and found both do the same thing. Is its possible its the regulator/amp thing above the glove box? are they are any tests for this system? Also haven't checked the in car temp sensor yet, would that cause this symptom? I haven't ever ran into so much trouble its a pretty simple system, or so i thought. Thanks 79Mercy
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg 
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#2
04-27-2014, 07:14 PM
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For starters, I would check for power at the compressor clutch connector.
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When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.
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#3
04-27-2014, 07:24 PM
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I did first, should have mentioned that but no power getting the compressor plug unless i leave it on for 5-15min
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#4
04-27-2014, 07:36 PM
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Quote:
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When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.
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#5
04-27-2014, 08:17 PM
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I didnt check that yet, is that the relay in the black box on the drivers side fender well? on this model there is only 1 relay under that cover, which i thought was aux fan relay. Thanks
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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