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@Ron Wymer

Check for and post all P or powertrain codes here. It will help us to know what is going on.

Go to how to check for DTC CODES here:




Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Check the pigtail to the alternator. 

They are pretty common on that era. I have misdiagnosed alternators due to a failed pigtail.

Unplug and closely inspect the pigtail. (not the main cable but the wide plug), check the wires close to the plug.

Many times I have seen it bad right there.

When you accelerate the engine moves and could break a flaky connection, then on decel it drops.

Does the battery light come on? I  am assuming it does


Nice, clean, luxury= fine automobile

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