Land Rover Repair: electriacl fault, fuel guage, discovery 200

Question
i recently came into a discovery 200 TDI, L reg 93.
it had been sitting for 18 months so i was well happy when after changing the battery and the shredded alt belt, that it started and i was able to get it home.
But... now, when i put it in reverse and move then apply the brake, all hell breaks loose!
the drivers sdie head light and indicator start to flash, the rev counter ticks in time and the coil light flashes, in time. Other times the fuel guage decides it wants a pice and joins in too!
when i try anything else like wipers etc, she really doesnt like it at all.

Am i able to sort this myself or is it a lost cause.  

Answer
Hi Neil,

sounds like a typical electrical problem.  Check the brake pedal switch. Could also be park neutral switch.

Then you should have your electrical system load tested.  Alternator and battery tested too.

Start there and see where it leads you.

Best of luck,

JohnMc