verify the cables that are NOT tocuhing the metal door. Sometimes the cables are old and they crack, just put black tape (electric tape) and that should fix the problem.
If there are no blown fuses in your Lincoln ls, then there could be a short in the wires causing your power locks to not work.
could be that the regulator in the alternate is failing and causing power surges in the electronics and the fuses are blowing to prevent damage to the device and vehicles wiring.
Check your fuses.
Check the fuses.
Mirrors Locks (MIR LKS). The fuse is for the power mirrors and power locks on the vehicle.
the power suppy diode are probably shorted.
check the circuit braeker
Check the fuses. You will find what each fuse does within your owners manual.
Try checking all fuses
burnt fuses
Your ground or power can be hooked up wrong....or the fuses might not be big enough...mine was having the same problem!
Best as I can tell from the Owners Manuals:1995-1998 models: Fuse #37 inside fusebox1999-2003 models:Front doors- #14 - engine compartment fuseboxRear Doors - #8 - inside fuseboxSee "Related Questions" below for more