When I put my MM in Reverse my AC goes dead - WHY?

[Ozz]

Greetings,
This was originally posted in Shop Talk but I have not gotten much of a response so I thought I'd try in the Transmission section...

I have been having a strange problem lately. When I put my car in reverse, the AC (whole EATC), overhead console and power steering quit. After a couple of seconds, it comes back on. The EATC & overhead displays sometime (but not always) flicker slightly when I drive.

I know that low amp power comes through fuse 16 for the EATC and overhead console. I have checked this fuse (ok) and monitored the voltage across the circuit when the problem happens and it does not drop. So, fuse 16 is not the problem.

Not sure why power steering quits too. It's power comes through fuse 114 in the battery junction box.

My reverse lights work fine also.

Both problem systems share the PCM but I'm not having any other problems (engine, autolamp, etc).

Possible causes:
- PCM
- PCM power relay
- PCM power diode
- Transmission Range Sensor
- Blower motor relay
- AC clutch relay

Has anyone had this problem? What solved it?

HELP!!!!!

Thank you!

[SID210SA]

I thought we went thru this before in this thread>>>.

http://www.mercurymarauder.net/forums/showthread.php?t=45854

You now have three differnet threads with the same problem....did you call Dave with the number I pm'd you?