Marcos Maniacs

I have been chasing an electrical problem for the past 45 years on my Marcos.I have re-wired the car completely, added relays checked and reconditioned all of the chassis earth points and replaced all bullet and sleeve connectors with new stainless steel B and S connectors and applied dielectric grease to all fuses and connector.  My AMMETER is always indicating a 10 to 15 amp charge while driving, DAY OR NIGHT. I have a built in regulator in the alternator which was installed at the time of rebuild.The alt is a MOTOROLA SEV.Anyone have any ideas? 
 
Regards,
Larry3v5536