How much current can I safey draw from the 12V ignition wire, like the line that comes into the back of the stereo?

I'm just looking for enough juice to switch a 12V quad pole double throw relay.

to activate the relay or the power you want to send through it?

Activate...go for it.

Yea, just to switch the relay'* coil on/off.

Just read in the spec sheet it uses 1.5W, which is about 125mA. That'll be ok?

yes it will be fine.

the amount of power to trigger a relay is next to nothing compared to other possibilities that are on that wire.

go for it w/o thinking twice

On a related issued, does anyone know what those connectors are called that simply "pinch" pre-existing cables allowing you to tap into them easily? And will they have them at like Home Depot/Home Hardware?

As pictured here:


Thanks.

Depending on the type...they are called taps or tap ins

Some usually blue for the size wires you are using

scotch(sp) connectors

Yep, thanks for the info: 3M Scotchlok Connectors

Full product listing: http://products3.3m.com/catalog/us/e...er/output_html

What guage is the wiring going into the stereo? So I can get the appropriate connectors.

Thanks.