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#1
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Recharged AC with R12, cold..but..
The clutch to engage the AC compressor will not engage unless I directly rin 12 volts to it from the battery. In this case it blows very nice, cold air. However, what switch controls this inside the car? What switch/wire causes this clutch to engage. When I turn the "colder" knob clockwise, it switches to a different blower, but the clutch doesn't engage. Whats the deal here?
Also, When I hold the cruise control stem to the accel up or accel down position, the car gains or loses speed respectively. However, if I hold press it quickly to hold speed, it chooses not to do so. Is the amplifier that big monstrous box on the passenger side of the engine compartment? Can I rebuild it myself if it's not totally toast?
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http://www.betten.mercedescenter.com...n_banner_1.jpg 1976 300D 190,000 Miles Colorado Beige 1975 300D Parts Car 78,000 Miles Rustbucket Also Colorado Beige 1984 190D 2.2 (Dad's) 156,000 miles Champagne Metallic Clearcoat |
#2
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cruizin
i am trying to picture in my mind... this is 83 240, right?... dont you pull to set and push to release from cruise?
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
#3
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pull=resume
push=cancel up or down=accel/decel respectively. Up or down can also be used to set it. The amplifier is over the driver's feet. You have to remove that underdash piece and you'll see an aluminum box, that's it. Look up at Fastlane for a pic so you know exactly what it looks like. I think you are talking about the actuator under the hood, it is rebuildable but try the amp first. The actuator is what accelerates/decelerates. Yours sounds like an electrical problem, not mechanical. Thanks David
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_____________________________________________ 2000 Honda Accord V6 137k miles 1972 300SEL 4.5 98k miles _____________________________________________ |
#4
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there are two switches on your a/c reciever/drier. one has wires coming out of it to two plugs, the other is a short and stubby one with two wires plugged directly into it. if you jumper those two wires, the compressor clutch should engage, its possible that switch is bad. on the other hand your acc unit could be bad too.
help me understand, which car is this?
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1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350 |
#5
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Hmm
This car is a 1975 300D, the W116 chassis. So the ACC control knob is just a knob that says colder and you turn it clockwise to get it colder. This is the only control on the AC, so it seems hard to imagine what could stob the clutch engagement
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http://www.betten.mercedescenter.com...n_banner_1.jpg 1976 300D 190,000 Miles Colorado Beige 1975 300D Parts Car 78,000 Miles Rustbucket Also Colorado Beige 1984 190D 2.2 (Dad's) 156,000 miles Champagne Metallic Clearcoat |
#6
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Quote:
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Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
#7
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Oh
Definitely a typo. Meant W115, how foolish. In any case, what switch activates this clutch on the compressor
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http://www.betten.mercedescenter.com...n_banner_1.jpg 1976 300D 190,000 Miles Colorado Beige 1975 300D Parts Car 78,000 Miles Rustbucket Also Colorado Beige 1984 190D 2.2 (Dad's) 156,000 miles Champagne Metallic Clearcoat |
#8
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115's have a vacuum operated relay. If you have a vacuum leak you might not have A/C. You might want to try the vintage forum to see if someone is familiar with that system.
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Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE |
#9
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Are you sure that your AC system is adequetly charged?
I would also suspect the vac switch if your auto has one...that car is old enough that it probably needs some attention. |
#10
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I'm not sure about your specific model, but there could be an overpressure cut off switch which has been activated. There is on mine. Having too much refrigerant can be very dangerous to you and your car. Did you fill it yourself - and if so, did you use guages?
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http://i284.photobucket.com/albums/l...aman/Fleet.jpg Peach Parts W124.128 User Group. 80 280SL 85 300SD 87 300TD 92 300D 2.5 Turbo 92 300TE 4Matic |
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