avital 5303 lock holds too long

Hey

I just installed a an avital remote start in a 1988 pontiac firebird formula i used relays to the lock and unlock.  all works good

but when i lock the doors the lock pulse holds for like 60 seconds or so that makes a awful chattering on my door locks i tested with a

volt meter also the unlock shuts right off but the lock holds any ideas?

Thanks

tryed a different brain same thing i didnt put a diode across the coil though am i wrecking the brain by not putting a diode across the coil?

How do i do that lock wire from the brain diode that to the pos coil?

Thats what i got now but i dont have 87a  grounded i dont have 87a conected to any thing