Thanks Homepin.

I did disconnect the power wires from the drop target coil but still blowing the fuse, I wondered if there was a problem on the solonoid driver board that is still causing the fuse to blow. Its all a learning curve for me.

But probably should wait til I get my new fluke meter as nino suggested and get a proper reading on all the coils.

As always, many thanks to you guys for taking the time to answer my questions and give me pointers. Very much appreciated.

Cheers

Ric