Which fuse is always on

I got a 97 4x4 and I wanted to add an always on 12v outlet, which fuse under the dash or in the engine bay can I tap into? Thanks.

 

If you want it "always on" I'd go right off the battery w/ it's own inline fuse.

similar to.....

Red goes to battery.
Black goes to battery (or grounded to the body somewhere)

 

Varies from truck to truck, but with the key off get out your voltmeter and test some of the red and black wires at the fuse boxes under the hood and behind the interior panel by the driver's door, depending on what's closest to your project. Disconnect battery before doing any actual work.

Most models have always-on accessories in the center console (cig lighter for example.)

 

https://www.tacomaworld.com/threads/power-outlet-mod.62495/I have a Blue Sea dual USB fast charger in place of the right cigarette lighter plug, the always on jumper wire gives constant power to both

 

dumb question but is the truck battery 12v just wana make sure. So I can go straight from the battery? It wont make any problems?

 

so to test leave battery connected but when doing the actually work disconect battery

 

btw guys the reason i am doing this is because i bought a console fridge it works off of 12v and it says it has a battery safety cutoff for it wont drain the battery, the power source for the fridge is a cig lighter male

 

No. it won't cause problems, unless you leave something plugged into it and drains your battery.

I have a dumb question...
Isn't there already one in the truck?

 

an always on 12v female cig, no

 

https://www.wirebarn.com/Wire-Size-Calculator_ep_41.html

 

thanks for the website, i think ima get the 16g with 6 feet

 

Many people have taken that cig lighter wiring apart, and hard wired it to their battery with an inline fuse. Don't try to tap into an always power ON fuse circuit for a fridge. Definitely go straight to the battery with the proper fuse/wiring. Or use the cigarette lighter for the power source as designed.

 

Will this work? fridge is 12v and says 8amp. Thanks

 

That's all you need.

Where do you plan on putting it because that one doesn't look like it can be mounted anywhere.
Probably just going to hang freely.

Something like this you could drill a hole and mount it.
Dongge Cigarette Lighter Socket Extension Cable

$15 Dongge 12V/24V Fixed Thread Cigarette Lighter Socket Extension Cable with Perforated Terminal Direct Battery Type car Adapter 2.5mm² 20A Heavy Duty Cable 10FT（Free Two Blade fuses）

https://www.amazon.com/dp/B07TTNF118

Those might have to be cut and spliced on the adaptor side, to be able to feed it through the firewall.