Will an RCM solder problem kill ALL power? (Or at least "all power" as perceived by the driver.) I mean, to nix the FOUR WAY flashers?

I'd have to get the service manual out and start going thru those AWFUL auto-industry diagrams to say for sure, don't wanna do that.
I really didn't/don't think that all that much goes thru the RCM.






(You know I'm gonna go get the service manual out now......)