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#1
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1996 C220 A/C Compressor Clutch Questions
Hello All,
I need some electrical help. I troubleshot my A/C System today is the clutch is not engageing. I checked the Clutch Activation Relay (A) Silver unit made in Ireland. The Realay was good including the resistor. I then cut the Blue/Green wire from the Clutch and noted that the Clutch shows a dead short to ground as verified by a continueaty check with my multi-meter. So here is my question: Where can I get a copy of the On-Board Electric Schematics for the Clutch? What is the normal fix for a shorted to ground problem with the clutch? Can I fix this problem on-board without removing the entire clutch/compressor assembly? Where can I get the chart or master key for the A/C Control Panel Readings when I put the panel into the code display mode (I don't have any codes, so I guess that I don't have any faults other than the clutch)? If you did not notice, my car is a 1996 C220. I love this car and hope not to have to retire it for another ten years. I have 140,000 miles on it now and expect to retire it after it has 300,000. |
#2
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Don't know where you got the info on A/C clutch operation BUT it is wrong. ON the 1996 & later cars MB uses the A/C pushbutton to activate the clutch.
POWER from the pushbutton turns the A/C clutch on!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Okay, thank you for your input. You need to understand that all I have to guide me is the Owners manual and a Haynes manual for the RH Drive version of my car. So with this said, can you answer some of my questions? I bought two CD-Roms off E-Bay last night that are purportedly the correct Service Manuals for my car.
I would appreciate any help that can be thrown my way. Very Best Regards, Jeremy |
#4
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You having continuity to ground through the clutch windings does not mean you have a short to ground.. you need an ohm value to determine if there is s short.
Do you have a value?? |
#5
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Resistance Value
Dear ARthur,
Sorry sir, I have been out of town I will attempt to get an Ohm value in the next few days. Thanks for trying to help. VBR, Jeremy |
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