what’s proper way to tap into power?

I am in the process of wiring several after-market electronics (aux fuel pump, glow plugs, fuel heater, etc.) into my old Land Cruiser and all the items will be wired with relays. Therefore, I will need two power supplies, one low-draw supply for the switches, and one potentially higher draw supply directly to the relay.

Questions:
To avoid having half a dozen leads coming off the battery terminal for the higher draw supply, I was thinking about running one big lead (8-10AWG?) off the battery to a fuse block, and splitting the power to all the relays from there. Are there any concerns in doing it this way?

I would like the low-draw power supply for switches to be dependent on the ignition switch. I am thinking about using another fuel block here as well. How and where is "proper" way to tap into power from the ignition switch?

On the older Land Cruisers, you can use the BLACK/ green or BLACK / YELLOW from the ignition switch itself. Test with a meter to be sure.

The rest of your info is correct.

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Prepare your future. It wasn't the lack of stones that killed the stone age.

Okay, but how do I physically tap into that wire?

Appropriate sized fuses at power source...

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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001

so after I find the BLACK/ green or BLACK / YELLOW wire, what do I do? Cut it an attach both ends to the pole of the fuse block? Use some sort of splicer? ...?

Don't use scotch-locks or t-taps. Use a "telegraph" connection. Here's how: Carefully remove the insulation, spread the wire then feed your connecting wire through the center as if you'd be threading a needle, wrap it around once or twice and tape. This works good for low current applications.

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Prepare your future. It wasn't the lack of stones that killed the stone age.

I solder everything.  I'm not a big fan of the "threading the needle" method, but some people swear by it.

What it ultimately comes down to is how do you feel you would make the best connection?  If you've never soldered anything soldering probably wouldn't be the best way.  If you don't have a good set of crimpers (a dedicated set that does nothing but crimp and maybe cut wires) you probably shouldn't use crimps.

If you've ever used scotchlocks or t-taps you should already know not to use them!   haha

In the end, whatever method you can do the best will be the best way.

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Kevin Pierson

i use the threading the needle all the time but i solder all connections.  then tape them while hot with e tape and it conforms like heat shrink.

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you can do it....
advanced MECP, lol does it really matter....
patience is a virtue