Recommended Posts

@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 >>

How to check for codes Caddyinfo How To Technical Archive >>

Cadillac History & Specifications Year by Year

Share this post

Link to post
Share on other sites

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

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    No registered users viewing this page.