Sanuinololu pins question

Sanguinololu 1.3a
Pins in question are the three 12v pairs between the motor connectors.
First, I'm only measuring ~2.5v at all three of these... all other powered pins measure correctly. Any idea how / why these are so low?
Second, what the heck are these pins #'s (for assingment in Marlin)?
I would like to use them for fans / LED's if possible...
The schematic shows them as "JP6, JP4, JP2"... if I'm reading it right. But I can't figure out what their "D" #'s would be.

Thanks in advance.
Buzzard

Looking at the schematic, and thinking... are these merely "always on"... not controllable via software?

Edited 1 time(s). Last edit at 07/14/2012 12:30PM by Buzzard.

They are just connected to 12V so you should see 12V on them all the time assuming you have a 12V PSU connected.

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[www.hydraraptor.blogspot.com]

Thanks nophead...
That's what I had ~sorta~ concluded.

No way to control them via an M42 code?

Still can't figure out why they are only showing ~2.5v, when all other 12v are right on... must continue to investigate.

No but there are spare pins that you can control on the I/O header.

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[www.hydraraptor.blogspot.com]