My 1975M Skyhawk has been giving me fits lately! It's very intermittent but when I go to start the engine and get to the start position I hear the master solenoid klick out and the electrical system shuts down with the master switch in the on position? I have to recycle the master switch numerous times to finally get the starter to engage? My master switch is 3 years old and both the starter and master solenoids are 1 year old and my starter is 1year old! Any ideas???