Land Rover Repair: Flasing M&S Mode indicators 03 Discovery, neutral safety switch, m s mode

Question
I took the truck on the beach over the weekend and then drove home 150 miles in the rain.  This morning the M&S lights were flashing so I took the other car in to work.  From reading some of your other answers, it looks like I need to check the battery and fuse #21.  My guess is that the transmission ECU connectors may have become corroded from salt water.  Are these connectors accessible or do I need to bring it in?

Answer
If you have been on the beach, I would suggest that you may have contamination to the transmission wiring harness from the salt water.  Water normally enters at the neutral safety switch and corrodes the pins.  In general, you would need a hoist to get a good look at it.