all gauges reading high

ok...here is a real puzzler...

1990 Trans sport...all gauges reading high...

Speedometer - actual speed 30? - Gauge speed 110

Tach is normal but gauge reads very high

oil pressure normal but reads high

fuel tank has plenty of fuel but orange low fuel indicator light is on and gauge reads full

rear door ajar indicator is on but door is closed

any ideas or thoughts????

IN case you did not see these in a precious post
www.avigex.ca/xport/instrumentpanel.jpg
www.avigex.ca/xport/instrumentpanel1.jpg

My first impression is you have a ground problem....now tracing it down is something else.....i,d first remove the i/p and play with connector.