2015 Tundra Wiring Help

Hi guys,

Looking for a switched 12V source to tie into.

The only switched power fuse I could find was in the engine compartment fuse panel, a 10A fuse labeled "IGN".

My question: what does this fuse power? If it blows, will my customer lose power to anything important? IE - computer/engine ignition power?

Last thing I want to do it tap to a fuse, blow the circuit, and this customer loses engine power while driving.

If it's only a matter of losing some interior accessories I can live with that.

Thanks in advance!!

 

Good call on the Add-A-Circuit. I suppose I could probe under the dash, this one is just very accessible with our current wiring.

Just want to make sure this fuse is not critical for the truck to run/drive.

For the record I do not have the truck here at the moment to pull the fuse and try it out, just trying to get some preliminary questions out of the way.

 

Awesome thanks for the help.

The draw is very low amperage, well under the 10A so I'm not too worried.

Just do not want anyone being responsible for him losing critical power to something should the fuse blow.

Thanks again

 

So, for wiring a switch, can the Add-a-circuit be placed in the in-cab box via the "Panel" slot?

 

I really like these you can get them in all ditfferent amperages and fuse types usually you can find a empty hole in fuse panel to install these so they don't effect anything else in vehicle.

 

add a circuit are nice too

 

If that fuse blows, the truck won't start. If you really want to be paranoid, tap into the IGN fuse, but wire it to a relay coil (as opposed to directly to the new load). The other side of the relay coil goes to ground. Then one NO contact goes directly to the battery, and the other NO contact goes to the load through its own fuse.

 

What if I used the Seat Heater location in the in-cab fuse box, (I do not have seat heaters) and put in a 7.5 amp fuse?

 

I don't see why that wouldn't work.

 

So what worked?? I’m currently battling LED wiring... rocker switches were power ran to the battery. So they stayed illuminated when the truck was off. Went and got this “add a circuit” and tried it on the IGN under the hoodie fuse box. No go. Then tried it on a few different ones on the in cab fuse box and still no power.
What worked for you?

 

Ran wiring through the firewall to rocker switch, tapped adjacent for LED light for switch:

Installed circuit breaker and relay to lights, room for a couple more for when I add my front light bar. Reverse lights come on in Reverse and the switch will turn them on as well, used a diode to prevent back-feed through switch.