These clusters have an automatic self test feature built in (ie when it first powers up normally you see all the guages flash, and the speedo reads 188 along with all 8's in the odo and trip meter).
Err7 would indicate that something has failed during the self test of the cluster. Does your cluster flash when its first powered up?? If not it could be faulty, and it shouldnt read 0 for the odometer...that should be an accumulative reading from when it left the factory.
First Ever Car - '84 XF Fairmont Ghia....Big Luxo Tank, Just Gotta Love that Velour!
Previous Ride- '87 XF S Pak...Now Retired with 305,000 on the clock!
Previous Ride-'99 AU Falcon S,Got sick of the 6...Need a V8!
5/1994 ED Futura Classic 5.0 in Polyneisan Green - One of the last ever built