2015 Chevrolet Express, OEM Backup Camera

Thanks again man, really appreciate you and all the assistance you have been providing throughout my frustrations. Glad you're here on this fourm helping strangers in anyway possible. I understand relays and how they work, but powering the backup alarm on a separate relay would be like rerouting the wires entirely from the backup beeper itself to the new relay, right? I'm more hesitant cutting wires when its a much more significant consequence like the starter or fuel pump relay. I took the easy way already and tapped the wires on the fuse box becuase I wasn't willing to weave wires all the way to the backup alarm. How would you attempt to power it on a separate relay?

The easiest method would be to cut the positive feed to the backup alarm. The end from the backup light relay will be your relay trigger (86 with 85 to ground), and you just connect 30 or 87 to the end that connects to the backup alarm. The remaining terminal (87 or 30) would go to a fused constant. Alternatively, if you didn't want to cut the wire, you could look into removing a pin from a connector wherever it's convenient. If you remove a wire at a connector under the hood and snap in a replacement, your new replacement will be your relay trigger wire. The pin you removed will be your output. You'd just need to make sure it's well connected and won't come apart by itself. If you can find both sides of the same connector at a junkyard, just cut it off so you have 6 inches of wire on either side and you can make your own adapter harness.

So I checked for continuity at the backup lights Left/Right to the back up alarm (pretty obvious there's a connection already but for funsies) and yes they do in fact have a connection somewhere. I'm more peeved about the F26PA fuse not doing anything that Im aware of. Is there a method of tracking a fuse to find what if any wire(s) it actually passes power to? Some kind of toner? Really just want to separate the lights from the siren altogether, found a few diagrams with the lights on the 1624 circuit so I shouldn't be to surprised. I'm trying to track the backup alarms main power line and its not as easy as I thought. I understand why its directly linked to the lights just not how / where the intersection occurs. no specific connector to adapt a new link with. I figure if I find that I can divert the alarm side and hopefully weave it to my switch. Turning off the lights and alarm was never part of the plan. the backup camera gets its power else where and I haven't investigated this thoroughly, If its not broken don't fix it mentality. Lemon-Manuals seems to be going through some stuff. https://lemon.dogeware.me works :/

The diagram shows both backup fuses powered by the backup relay. Yes you could use a toner/tracer kit but will likely have issues isolating the other end as the vehicle wires are taped directly together for the length of the harness. This means you'll pickup the signal on most everything in the harness. As much as you may not want to, the simplest solution may be running your own wires.

turns out it was a aftermarket backup alarm installed, so that explains why it was powered on the F27PA backup lights wire. Ended up separating the wire right were the lines met with a jacketed two line wire and strung it all the way to the dash. fun, and now functional. Also grabbed a Jensen approved Backup Camera and ran that into the dash as a front cam also, grabbed power of the rear roof speaker.. Think if I buy the tow package I'll pay for the experts install it. thanks again Lee Lopez for your assistance.