Ignition/keyed Power Wire

[Metro12]

I installed a factory nav and aftermarket amplifier. I need a keyed/ignition power feed, to trigger the amp to turn on. On the NBS 2007 Silverado radio harness, there are no ignition/keyed power source. I have to beleive the radio turns on through the GMLAN. I have searched on the fuse box (cabin and engine) and can not find a keyed power source. Any ideas?

[Metro12]

Found one. Hopefully anyone else searching the forums will hit on this.

 

In the engine bay fuse box, #20 is labeled Transmission Ignition, tap onto that fuse. I would only use this fuse to trigger amps or other relay type applications. Obviously it would be possible to blow the fuse if using it for anything other then to trigger an amp or relay.

[minibike132]

It looks like at the base of the steering collum there is a grey connector with 22 cavities. Cavity B5 should have 2 pink wires in one side and no terminal or wire on the other side or a wire in it but it won't go very far. If you are going to use this power I would look to get the correct terminal to use in there and not just hack into one of the 2 that are there. So far this is the only place I can find but 1 schematic is showing power in accessory run and start and another is showing in only run and start but not accessory (yea the schematics are not always right you need to verify them).

[minibike132]

I was searching and typing that while you were telling us you already found one. I would avoid sticking a wire into the blade on a fuse, this spreads out the terminal and can cause issues down the road, but it's your time so if you want easy go for it.

[minibike132]

ugh how do I make my posts go away. The first one is on a 2 amp circuit you can't use that completely disregaurd everything I have said.

[LAGA]

The only other one that I have found is up in the over head console. It is a pink wire ( same pink as under steering column ?) I used it for my radar detector. No problems so far.

[Metro12]

The 2 amp line should be enough, right? I think it only requires like .5 amps or something similar, to trigger the amp.

[minibike132]

 

your just looking for an on trigger not an amp power. I don't know much about aftermarket amps. If your amp has a b+ that is always there and just needs a signal to tell that b+ to be activated then it works like the factory amp and the factory unit has an output for that purpose.

[minibike132]

If your only going to draw .5 go for the previously mentioned cirucit with the 2 pink wires. This way if it does draw more all we sacrifice is a 2 amp fuse. If we go through the amp on through the nav unit we put that in jeopardy and I'd rather tell you to experiment on a 10 cent fuse than an $800 nav unit.