Fuse for fuel injectors

Hello All
I am having trouble to sort a starting issue on my 1997 300tdi Automatic.

The 20amp fuse for the fuel injectors keeps blowing as soon as the ignition is turned on.

I have made a start looking at the wires and connectors around the injector pump itself (as that was the last thing to be looked at a garage), managed to dissconnect the main connector, but the fuse still blew.
In the process of discconnecting the smaller connector, but it is being a pain at the moment.

Besides the injector pump, is there anywhere else I could begin to look around for the bad connection/short.

Any support as always would be grateful.

All the best for the New Year

Nigel

Sorted the problem.

Near the air filter box there is was a short from a wire that rubbed against the wheel arch, think it is near the ECM.