Has anyone hooked a FIsh Finder to trolling motor circuit?

bass2reds

Weapon of bass destruction
Joined
Jul 24, 2013
Location
Plantation, Florida, United States
Boat
Back Country 151 ProGuide
#1
I'm pretty sure I know the answer...It'll cause interference. But just checking because I tried all day to fish a wire thru my bow to the stern but it's blocked due to the small PVC conduit and the bad angles in the tube the trolling and bow light wires run through.
My only option is to splice into the trolling circuit or splice into the bow light circuit but that would mean I have to leave my bow lights on all the time since that circuit is switched.
It's not that important that I add a 2nd graph to the bow, just wanted to if I could. When my boat was built in 2001, they left a spare switch on the console for an accessory but the wires from it were run to the stern and are tapped up in case I needed to add another accessory to my live well or for a power pole but there is no way to connect to it and get the additional wife to the bow.