Golden Rule - Thanks for the lead. I copied the article you recommended, and one statement hit home. It said to check the amperage draw of the compressor clutch, or I would be using the MAS control unit like a very expensive fuse. I had previously checked the clutch with a jumper, and it ran beautifully. Today it barely engages, and sucks up a lot of current. I popped a 20 amp fuse in line with an ammeter. I don't like the result, but at least I know what has to be done, i.e., new compressor clutch. Thanks again for your help.

Do you have any idea why the code 17 trouble code keeps popping up, even after installing a new oxygen sensor. The code says that the signal lead is shorting to ground or B+, but I can't track the problem down. The check engine light doesn't come on until the engine is hot, and usually just before the end of a drive. Very strange. Any suggestion would be appreciated.

Walt Lake