Gentlemen

I'm trying to get a general idea of what the various circuits control.

It appears that 30 and 30U have power at all times. So whats the difference between 30 and 30U

15 appears to be power key on from ignition switch.

87L Looks like it may be regulated voltage through the OVP relay. Has the base module replaced the OVP function?

61e I have no idea what this does.

Your help is greatly appreciated

Thank You
John Roncallo