I have just bought a 2002 ZT 1.8T as a project. When I bought the car the battery was flat so I have charged it up and put it on the car. When I first put it on everything was fine but yesterday (about a week after fitting the battery) the rev counter, speedo, fuel guage and temp guage do not work. The central locking will unlock from the fob but not lock, the same applies to the key in the door lock. The car locks and unlocks from the centre console button. I also have 'Er' on the climate panel and the heated rear window button does not light up. The fog light, front and rear, and the main beam tell tale lights do not illuminate when the items are turned on. I have run the diagnostics on the climate panel, no errors shown, and instrument pack, dials do not move although all warning lights illuminate. I suspect the majority of the problems are down to the instrument pack and would appreciate any comments.