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Hi,
I want to add a fuse to the passenger compartment fuse panel for a dash cam, I want to power with key on (otherwise I could drain the battery. Looking in the owners manual I see a layout of the fuses (see attachment) I bought a add a fuse at an auto parts store but just looking for advice which fuse to tap into. I suspect 10 Amp circuit should be fine. Just for easy access for me I was looking for a circuit below fuse 40. Any ideas / thoughts would be welcome. See signature block for truck information.

Note: I didn't want to plug into the cig outlet direct because I wanted to hide / keep clean the wiring.

I added the fuse section of the owners manual.
 

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Do you have the up fitter switches? Those are powered with the ignition and are fused. If not a lot of the wiring. for them is in place so maybe someone can direct you where to tap into those at.
 

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Find the PTO bundle under the driver's side dash. There is a KEY HOT wire that will run power when the key is cycled.
 

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Find the PTO bundle under the driver's side dash. There is a KEY HOT wire that will run power when the key is cycled.
This. I used that wire for everything I hard wired, radar detector, phone charger etc. I saved the upfitters for things I needed to be able to switch.
 

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This. I used that wire for everything I hard wired, radar detector, phone charger etc. I saved the upfitters for things I needed to be able to switch.
What is the PTO wire fused at? One could build up a fused buss block for various items as you mentioned... You have me thinking now.

Cale
 

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Its in the PTO bundle, but not specifically for PTO. I think it was blue with a white tracer. If memory serves it was nto a whole lot, 5 or 10 amps maybe? More than enough for my phone and radar detector, but not for say an inverter or anything. You could use it to pump a relay and feed your fuse block with that...
 

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For anything that would draw some decent amps (IE light bar) I would use the KEY HOT feed to activate a relay feeding off the battery. To use it o power 1-2 AMP draw it's no problem to wire it direct.

I'd have to research the PTO wiring stuff to better understand the AMP rating of the KEY HOT White w/Blue tracer. EDIT: Owner's manual shows a 10A fuse.
 
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