2004 vue, of the 3 brake lights only the one at the top of the rear window works. fuses and bulbs seem ok and since this problem developed the brake lights on my trailer does not work either. Any ideas? Thanks.

Tony, our TB's only have 3 bulbs, 1 brake, 1 running, 1 backup.
If you happened to be playing with NEW LED bulbs (from local retail location) for the brakes, guaranteed you blew the fuse under the rear seat. It takes a special CK socket for the brakes that no one carry's. If you're only dealing with normal incondecent bulbs, I'd still check the fuse under the rear passenger seat.

Did you check the fuses with a test light? A fuse can look OK, but unless you test continuity or use a test light, you could be mislead.

feed supply problem somewhere ?but where ? try checking the wiring loom at the rear or as its called in american "pigs tails"

There is only one fuse for the brake light, so if the passenger side is working, the fuse is OK. You most likely have a bad bulb, bad bulb socket or a wire issue. The circuit board that all of the rear light are mounted to also has had problems in the past.
BTW - the fuses for the rear light are under the rear seat.

The best thing to do is buy a fuse kit, inside the kit comes a tester, full and mini fuses. Use the tester to check the fuses. Hope this helps

Check fuse #34 in the fuse panel located under rear seat.

Check the brake light switch, it might be bad.
It's under the dash, near the top of the brake pedal, connected to a bracket.

If the fuse and the bulb works , then check the connection to the of the brake light to the ignition switch ignition switch up to the battery.to your 2004 saturn VUE.

Have you checked the brake light switch or the fuse for the brake light switch.

see if you have power going to the break light. it may be bad bolb.or broken wires