[bcj]

After a decade or so, it's possible for corrosion to be a problem in various electrical connectors.
Under the hood, dash, seats, trunk - there's tons of them. Chasing which one can be frustrating.
I've had it on a motorcycle where they route through the headlight to the ignition key.

Usually re-plugging works short term, but doesn't keep the existing corrosion from progressing again.
Giving the pins/plugs a light coating of di-electric grease will slow it down by keeping free ions in the air isolated.

The ECU/BCU/TCU modules would be the places to start.

No guarantees. Some are convinced it could be juju too.