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Old 08-14-2002, 01:44 PM
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Join Date: Aug 2001
Location: secret
Posts: 3,044
Question A shot in the dark.. EHA /AC connection

Any body care to speculate on why my AC will work only if my EHA is disconnected. I show no voltage to the EHA, no continuity in the wiring through the plug, yet when I plug it in , the AC compressor clutch won't engage. I have looked at the schematic for the compressor and see no connection. Also if I remove relay"D' from the rely box, the compressor will not work. This relay engages when the EHA is plugged in. According to the Service CD, relay "D" is for the headlight washer.
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Old 08-14-2002, 01:55 PM
dpetryk's Avatar
Electrons can do anything
Join Date: Sep 2001
Location: Houston, Texas
Posts: 1,071
Could be problems in the wiring harness if it has one of those that decay and short out.
I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k
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Old 08-14-2002, 03:04 PM
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Join Date: Aug 2001
Location: secret
Posts: 3,044
At first glance it appears that the relay is in the wrong slot. That could only mean that they have been removed for some reason. I found a loose 16 gauge wire near the fusebox that leads to the trunck. I suspect it went to a power amp under a previous owner. If that is the case, I may have a mess down there.
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Old 08-14-2002, 09:10 PM
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,508
Stephen, I feel your pain.

What kind of car did you buy? You have had more than your fair share of problems with this vehicle.

I am coming to the conclusion that your car needs a priest instead of a mechanic.
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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