Hey Blackbeard, I just verified on my High Speed that no, I don't get any coils firing when I run the red light, regardless of whether the beacon is connected or not.
How often does your left hideout coil fire when this happens? The playfield flashers (top, both sides, and the two under the blue inserts all take turns flashing at a rate of maybe once a second when I run the red light, so if you coil fires at about that rate it may point toward a short with some of those like I mentioned -- if not then maybe that tells you to look elsewhere.