Hi All ! My passenger side tail light doesnt work, brake does. Bulb is fine (tried on driver side) fuse seems to be ok....help!! Thanks 2006 armada le

Did you put in a single one double element bulb in the housing.

A double element bulb has two lighted filaments, one that lights with tail lights and one that lights up with brake lights.

If it is a double element bulb, are both lit up when installed and brake pedal not pressed. If so, check break light switch under dash board at top of brake pedal.

The tail light circuit is separate from the brake and turn signal circuit. Either the bulb socket has gone bad or a wire has flaked out. Check for voltage at the socket on either pin base when you have your parking lights on. If voltage is present, it is either a worn socket failing to hold the bulb properly, or another bad bulb. If no voltage, determine which wire on the other side is tail light power, and run a new wire across to the side that isn't working and connect it to provide power.

THAT RIGHT IF BRAKE SWITCH BAD NO BRAKE LIGHT WILL WORK.SPRAY ELECTRICAL CLEANER IN BULB SOCKET BULB SOCKET COULD HAVE OXIDATION AND CORROSSION CAUSING POOR CONTACT.

You don't really need a diagram, it's simple. If you open both tail light boxes in the trunk you will see at the connector on the bottom a yellow wire in the first position. That goes to the brake bulb. If both tail lights do not work, make sure you are getting power to the driver side light first, if it is not getting power, the passenger side will not work either, they are in line with each other. If it is only the passenger side not working, the bridging wire could be bad.. try jumping it. Also, make sure you are getting power inside the tail light bulb holder. The metal connections can come loose. If there is no power to the driver side tail light it could be the bulb failure relay, that is the round red relay in the rear left side of the fuse box behind the ash tray/ cigarette lighter below the radio in front of the shifter. You should be getting power to the third brake light in the rear window...that is a different circuit and will not be affected. Try changing out the bulb failure relay, it supplies the power to the tail lights.

Sounds like you need to replace the drivers brake/tail light.

Bad earth connection.Clean or replce wire.

most rear tail lights and turn/stop lights are the same dual filiment bulb. it is possible for your tail light to work and your brake light not to and still have a bad bulb. I would check the bulb first, your brake light works on the left yes? this would mean that the fuse is fine

Use a 12 Volt test light at the tail light connector and see if power is present at the harness, this would indicate a possible defective bulb socket.

If the driver's side tail light is working, it's not a fuse. Use a test light to check for power at the bulb holder. One terminal will be for tail light, the other for brake/turn light. If the is constant power for tail light, replace bulb. If no power, trace wiring from bulb holder to driver's side junction. Probable broken wire between the two tail lights.

could be the socket where you put the bulb or the wire that goes to the socket. there could be no power going to the wire.

tnx 4 using fixya,

drcool