[Tigers] Wiring question

[Smit, Theo]

One bulb (in any of the circuits you described) should not cause a bunch
of stuff to quit simultaneously. The running lights and the license
plate lights should be on the same circuit in any conventional wiring
arrangement but they should be with the taillights (rear running
lights), not the brake lights, so the failure you're describing doesn't
make sense at first consideration.

However: Bad grounds can make a lot of things fail in interesting ways,
so that would be where I'd start looking. Also check to see if
combinations of lights fail where turning on one at a time seems to be
ok: turn on the running lights and see what works, then see if it
changes when you step on the brakes. If the brake lights work OK when
the running lights are off, but they stop working when the running
lights are on, is a indication of bad grounding at the taillights.

Good luck,
Theo