Porsche Enthusiasts Club Forum

the car came into our shop for a timing belt & water pump service... I did the timing belt and water pump service, can ran good, no warning lights.. My boss drove the car around for the week until the customer picked it up... The customer got about 20 minutes from our shop and the car died.
I diagnosed it as a fault fuel sending unit due to the fact that the tank was bone dry and reading 3/4 tank. put gas in the car and it fired up.
I went to move the car outside due to having to order the fuel sending unit.. I started it up and EVERY dash warning light was on.
I double checked all of the plugs I disconnected during the timing belt service and they are all connected and working well.

I guess if anyone has any information specific to this car and why all of the Warning lights in the instrument cluster are on that would be great.

Thanks