Hello,

I'd like to install a 2nd battery in my 2014 Tacoma Double Cab 4WD. I'm going to use a relay to connect positive terminal of the aux battery to charging system. Ideally, I want the relay to only be energized when the ignition switch is in the RUN position. (Although I understand it might be necessary for the relay to be energized when the ignition switch is in the ACC position.)

I'm planning to use one of the "Add a Circuit" products to create a power lead for the relay.

Does anyone know which circuit, preferably located in the engine compartment fuse box would be best to piggyback to?

Thanks so much.

AK