Battery Drain Problem

While trying to track down my battery drain problem

I replaced the DME relay with a solid state one 944 solid state DME relay

Then the car stereo with am Alpine single din head unit UTE-200BT

None of these upgrades fixed the problem, found this post on the Porsche 944 Rennlist forum and replaced the door switches which fixed the issue solved-my-battery-drain-problem.html

The new door switches are £30 a side