electrical problem CB 570

[HappyH]

I have a K6 CB 750 Honda 1976 model.  I have put an after market fairing on it some years ago, and moved the front blinkers in the process, onto the fairing. This has worked faultlessly for many years. Now after about 10 years without consitent running, i.e bike in storage, the bike blows a fuse every few kms or so.  It seems to be linked ( maybe wrongly) with the blinkers..  use the blinkers - they run normally, and within 50 metres or so of turning them off the fuse blows.  
I am using a  15 amp fuse.
Anyone got any suggestions?

[Re-run]

Electrical is not my bag too much but start with cleaning the contacts points of the wires and grounds. Clean the switch too and maybe replace to old flash unit with a new electronic one.