Good raw switched power comes in to the ignition coil by a black wire
from the key switch. Don't add any real load to that wire though and
remember that it is unfused all the way back to the battery. Use it to
control a relay wired  to a high current source like the alternator lug,
just as VW did. Why not leave the relay box and relays and use them?
Unlike VW, I would add fuses.

Mark

Sudhir Desai wrote:

>     1. Where is there a good switched power in the engine compartment
>
>     2.when the power is switched on, pins 1 and 13 see 12v.  1 comes
> from the AEM hall unit and when grounded shows just under battery
> voltage, and 13 is from a relay which shows battery voltage.  Does the
> power coming in from the hall unit do anything in the ecu or does it
> just tell the ecu "hey, i'm powered on and functioning".
>
>
> I am in the process of converting to megasquirt and have all issues
> resolved except for the switched power and where to connect the ~+12v
> coming from the hall unit.
>
> Thanks in advance.
> Sudhir
>
>