12v outlets always on

[PatDTN]

I've been considering switching one of the outlets to switched power in my 2009 Tahoe. I think the smart way is to add a relay to switch the existing power feed. Then you just need something from the radio to trigger the relay.

 

[mikez71]

No need for relay, 10A run/crank source in your MBEC

Check this listing for pinouts

2007-2013 GM UPFITTER CHEVY GMC JUNCTION BLOCK MBEC CONNECTOR 13504592 20791502 | eBay

MBEC Mid-Bussed Electrical Connector. Junction Block Connector. Chevy GMC Truck. (Retained Accessory Power). RedWire 12ga Battery Feed 30 Amp Position 5. VioletWire Run/Crank Feed 10 Amp Position 7.

www.ebay.com

Have heard you can modify one of the other MBEC plugs if you want to snag one from the junkyard.

 

[PatDTN]

No need for relay, 10A run/crank source in your MBEC

Check this listing for pinouts

2007-2013 GM UPFITTER CHEVY GMC JUNCTION BLOCK MBEC CONNECTOR 13504592 20791502 | eBay

MBEC Mid-Bussed Electrical Connector. Junction Block Connector. Chevy GMC Truck. (Retained Accessory Power). RedWire 12ga Battery Feed 30 Amp Position 5. VioletWire Run/Crank Feed 10 Amp Position 7.

www.ebay.com

Have heard you can modify one of the other MBEC plugs if you want to snag one from the junkyard.

Interesting but I have a bunch of relays and if the power for the outlets fails I'll look for the right fuse.

 

[Malii Denali]

I have a bluetooth adapter connected to my Aux jack. I would like it to go off, so that my Audible audiobooks dont keep playing silently as I walk away from the car... that has happened.

I had a bluetooth head unit in the old car, and I will be swapping to a newer head unit on this tahoe eventually... But I also like the idea of my magsafe mount not being powered up all the time, and i am way to forgetful to remember to unplug it each time. I would also use that key switched circuit to power my dash cam, I had one in the old car which used a capacitor instead of a LION batt. it was on switched power and just came on when i started the car.

There are sometimes stretches of 3 or 4 days where i work from home, and never go out and start the car. I dont want my accessories to be the reason why my battery is dead. that has totally happened to me in the not-so-distant past

somebody farther up the thread linked a power adapter that has a RAP circuit, and a battery power circuit. That combined with a simple relay would totally solve the problem. I just need to get it done.

Makes sense

 

[swathdiver]

I just unplug whatever my wife left plugged in.

 

[BG1988]

I've been considering switching one of the outlets to switched power in my 2009 Tahoe. I think the smart way is to add a relay to switch the existing power feed. Then you just need something from the radio to trigger the relay.

just buy a switched cig plug no chopping wires

 

[hillstrubl]

Ah, just noticing this in my 2011, I wish they were switched. I have a dash cam that is designed to turn on and off with the ignition. - I was seeing on another board (from a later generation vehicle though) that a fuse can be moved from 1 position to another to change from constant on to switched, not sure if that's the case for my GMT900 though.

 

[j91z28d1]

Ah, just noticing this in my 2011, I wish they were switched. I have a dash cam that is designed to turn on and off with the ignition. - I was seeing on another board (from a later generation vehicle though) that a fuse can be moved from 1 position to another to change from constant on to switched, not sure if that's the case for my GMT900 though.

Yes, this works and is the easiest way, no wire cutting, no relays to buy and if you want to go back just remove 2 fuse taps in the under hood box.

it's very commonly done on the corvette boards, but somehow not used at all on other cars.

I did it one day out of boredom and slight annoyance of unplugging blue tooth adapters.

here's a write up to explain it, just look up the fuse locations for your truck, it's in the under hood box but same idea. you get one port switched and one constant.

C6 Ignition Controlled Power Outlet

 

[Geotrash]

Yes, this works and is the easiest way, no wire cutting, no relays to buy and if you want to go back just remove 2 fuse taps in the under hood box.

it's very commonly done on the corvette boards, but somehow not used at all on other cars.

I did it one day out of boredom and slight annoyance of unplugging blue tooth adapters.

here's a write up to explain it, just look up the fuse locations for your truck, it's in the under hood box but same idea. you get one port switched and one constant.

C6 Ignition Controlled Power Outlet

How did I not know this?!? Going to try it out because I have a dashcam that I'd like to have switched power for, too.

 

[hillstrubl]

Why not hijack the wiper tap to just trigger a relay installed nearby, then have the following taps.
(see pic) you could install the whole thing just alongside the fusebox and almost zero additional load goes on the wiper circuit and the original fuse size is retained for the cig lighter