Electrical problem
1999 Lincoln Town Car V8 Two Wheel Drive Automatic 197000 miles

how do i replace oxygen sensors myself

Hi: by this time I expect you may have rsolved the problem?
Consider checking out or purchasing a book or check out the Alldata web site at a library. This may be too involved to explain here within reason of your time, without yourself having some technical reference.
I assume you have valadated the sensors require replacement?