from the description you've given there is a communication issue between the instrument cluster and the engine management (PCM). All the non working gauges plus the red spanner (service light) need information from the PCM to operate correctly. All the information is sent on the CAN to the modules on the vehicle including the cluster. The fuel gauge is hardwired to the fuel sender in the tank, this is why this still works.
You can perform a self test on the cluster as follows,
NOTE: The instrument cluster tripmeter reset button is located on
the right-hand side of the instrument cluster lens.
To enter the instrument cluster Self-Diagnostic Mode
simultaneously press and hold the tripmeter reset button and turn the ignition
switch to position II. It will take between 5 and 8 seconds for the instrument
cluster to enter the Self Diagnostic Mode.
The tripmeter reset button must be released within 3 seconds
of tESt being displayed in the tripmeter LCD, or the Self-Diagnostic Mode will
The Self-Diagnostic Mode will enter the gauge sweep
To navigate through or skip any of the instrument cluster
Self-Diagnostic Mode tests press the tripmeter reset button.
Record any DTCs displayed.
If the reset button is pressed and held for more than 3
seconds between tests, the instrument cluster will exit the Self-Diagnostic
The Self-Diagnostic Mode is deactivated when the ignition
switch is turned to the OFF position
The test numbers that are of interest are test 1 which makes all the gauge needles sweep, I suspect this will be OK due to the fuel gauge working.
Test 13 should display any DTCs that are cluster related, test 14 will show the vehicle speed in MPH in the LCD, test 15 will show KPH in the LCD and test 19 will display the RPM in the LCD. You can obviously do the self test with the engine running and driving the vehicle to check these signals. If when on the RPM the display is dashes this would confirm no signal from the PCM, if the RPM is displayed then this would indicate an internal cluster failure, if the cluster needs replacing then a new cluster needs to be programmed to the vehicle using Ford IDS or an equivalent tool.
Apart from the self test check the connector pins on the rear of the cluster and the fuses (there are 5 in the fuse box under the hood and 3 in the fuse box in the van for the cluster) and ground points for the cluster, the ground points should be on either side of the foot wells shown as G12 in the diagram below.
Other than this a diagnostic scan of the cluster is needed using either Ford IDS or an equivalent diagnostic tool, if there is no communication to the cluster from the tool and the fuses and earths are good then this would indicate a cluster failure.
I hope this helps but if I can assist further or if you require more information let me know and I'll reply as soon as I'm able to.