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#1
05-25-2007, 04:58 PM
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A/C question
My A/C compressor is not engaging. I am working from a Hayes manual which does not have much on the subject. There is a diagram which shows a pressure switch and a A/C relay.
I traced the wire from the compressor clutch into a harness and that's as far as I got. Where are these 2 items located? Can you tell me what this circular gizmo is on the driver's fender? I opened it and it has a white plastic looking disk that is wet. What on earth is it? http://i31.photobucket.com/albums/c397/funola/Photo_052507_001.jpg
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked 
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#3
05-25-2007, 05:01 PM
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That is your tach amp. IT should not be wet.
How is your Freon level? There is a pressure switch in the dryer. It is on the passenger side. down behind the headlight assembly. If Freon is low, the compressor will not engage.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#4
05-25-2007, 05:04 PM
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Forgot to add, you can jumper the wires together, with the center button pushed in on the CCU. IF the compressor clutch is good, it should engage. You can also leave the ignition in the the "run" position, but have the engine not running, and jumper the wires. You should be able to here the compressor clutch click as it engages and disengages
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#5
05-25-2007, 05:16 PM
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The Tach amp is not wet. My mistake. When I unscrewed the cap, this plastic lokking thing was shiny wet looking but it is some kind of sealant that I thought was wet.
It is probably low on Freon. The valve on the horiz pipe by the radiator releases a little pressure if I push on it. Is that where you fill from?
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
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#6
05-25-2007, 05:25 PM
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What is this box on the driver's wheel well?
http://i31.photobucket.com/albums/c397/funola/Photo_052507_002.jpg I would like better documentation than just a Haynes manual. What else is available at reasonable cost?
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
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#8
05-25-2007, 06:25 PM
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funola please add your location to your user info.
MBUSA cd is like $20. It has step by step instructions for testing the Klima.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42
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#9
05-26-2007, 12:17 AM
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I changed out my evaporator and flushed my lines once and while i was under,behind the glove box I disconnected a wire. It stumped me for weeks until I went back in and found what i had done. If you were in there check back for connections.
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