Good Source for Switched 12V Connection

[Jambi]

I'm in the process of creating an under dash panel that has 1 fuse block dedicated to constant 12V power, a fuse block dedicated to switched 12V power and a block for grounds. What would be a good source of switched 12V power to power that fuse block?

 

[rocknhorse76]

Power from the battery to a relay that is energized by the ignition switch. There is a post on the back of the ignition switch you can connect to with a ring terminal. Make sure you fuse that lead from the battery.

 

[Broncobowsher]

You are talking a fused panel that you want switched. That is likely to have multiple items, all likely to be pulling a load often together. I don't know of any switched power source that would be good at doing a whole panel of loads. So the relay switched (factory radio circuit comes to mind) to energize the panel is the better plan.

 

[rocknhorse76]

You are talking a fused panel that you want switched. That is likely to have multiple items, all likely to be pulling a load often together. I don't know of any switched power source that would be good at doing a whole panel of loads. So the relay switched (factory radio circuit comes to mind) to energize the panel is the better plan.

That’s what I’m telling him to do. Use a relay to power the main buss on the fuse panel. Fuse that hot wire for short circuit and/or overcurrent protection. The radio power wire works fine for switching the relay, or add a wire to the post on the back of the switch. I’ve done that to control nearly every single load in my bronco.

 

[Steve83]

(click this text)

 

[walker_creek]

Beware that the 12V power to the post on the back of the ignition switch opens momentarily when cranking the engine. Won't notice this or matter on most things, but I initially used that source to give my Holley Sniper the run signal and it caused intermittent no start issues that were a real treat to trace down.

 

[Madgyver]

bat+ to a relay that switches on with a key on position/lead from fuse box or ignition.

 

[.94 OR]

I set my dad's quad up that way. He has lights, switches for tow behind grader, fertilizer spreader, snow blower, hot grips, etc. I ran a keyed signal to a continual duty 100 amp relay (looks like an old Ford starter relay) and then to his auxiliary fuse panel. Being old he forgets to turn stuff off and a dead battery is a pain. Now he can just turn the key off and every circuit goes dead.

 

[blubuckaroo]

I'm in the process of creating an under dash panel that has 1 fuse block dedicated to constant 12V power, a fuse block dedicated to switched 12V power and a block for grounds. What would be a good source of switched 12V power to power that fuse block?

Jambi, I'm in the process of rewiring my '62 Ranchero. The wiring for this car is much the same as the Bronco, and for most Fords of that era. The American Autowire uses the center stud on the ignition switch for all the standard switched loads. They do warn you however that additional accessories with substantial loads need to be fed through a relay fed from the battery, but you can still use the existing switched power to trigger those relays.
The only separate relay provided in the kit is for the horn.

 

[pcf_mark]

I installed this

https://www.speedwaymotors.com/Pain...Xq0JYo1m2KI8LBzLHiqXGfR7xM2u95LhoCOBAQAvD_BwE

Instantly gave me plenty of protected circuits and did not push nay of the legacy Bronco wiring beyond its...capacity/due date/limits. 12v from the key closes the included relay.

 

[toddz69]

Beware that the 12V power to the post on the back of the ignition switch opens momentarily when cranking the engine. Won't notice this or matter on most things, but I initially used that source to give my Holley Sniper the run signal and it caused intermittent no start issues that were a real treat to trace down.

What did you end up using as a switched hot source for your Sniper? I'm helping install a kit in a few weeks and I'll probably need the same info.

Thanks,
Todd Z.