this post was submitted on 12 Mar 2024
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To answer any of your questions we'd need to know what 7 way plug kit you got. Depending on the type of auto reset it can be minutes before reset, seconds, or it might stay disconnected until power is cycled.
Frankly I think you're overblowing the risks in all scenarios here. If you have a short in your brake circuit that blows a breaker, they're not going to work anyway regardless of what kind of breakers you're using. Auto reset breakers aren't going to fry your trucks electronics, nor should a short, because you should also have a sensible fuse on the circuit (unless you hooked up directly to your battery you probably do).
7-way kit is ETBC7 from etrailer. Breakers included are Pollak PK54230 and PK54240. These are thermal overload breakers and typical of 12V auto reset breakers. They get hot and a bimetallic strip flips up breaking the circuit.
These breakers are used instead of a fuse. That's why I'm thinking of using manual reset.
I can just see them ticking away if there was an unattended short.
Edit: Also, the instructions on that ETBC7 kit include grounding directly to the battery. I assume, since so many people suck at electrical, that's the safest way to ensure there is a proper ground. I'll be making my own good ground somewhere with bare metal.
Just put an additional fuse rated just higher than the circuit breaker inline
In case of a fused breaker?
Your fear is burning your truck down because of the breaker auto-resetting and causing a program, right? Adding a fuse before the breaker will allow the breaker to operate normally. But if it's a serious problem, like an actual short and not a temporary overcurrent, the fuse will blow and not reset.
That's a pretty good idea. I've got Maxi fuses in 40 and 50amp values. Maxis are slow blow, IIRC. May do this.