Can anyone give me some pointers on how to get the terminals out of a 20b TPS plug please. I have poked and prodded around in the plug but cannot seem to dislodge the terminals. Really hope someone can help.Thanks.

These are very similar to Delphi Metripack, but made by TE Connectivity (Junior Power Timer series) for DSMs and the Cosmo. See the notches below the terminal openings? You should be able to insert a small jewelers' screwdriver (under 1.0mm) to undo the terminal lock on each pin. This is after removing the TPA (red piece), so the freed wires can be pulled out from the back.A decent set of terminal tools makes things MUCH easier here. For connectors like these, my go-to tool is a Volkswagen terminal tool that resembles a pair of tiny tweezers.