Rear light assembly not working properly

Hi,

The bulbs are duel element. So, when the parking lights are on, one element is used in the bulb and when you turn the signals or brake lights on, the other element works. As far as the back up lights, that is a separate circuit and bulb system.

If you look at the first pic, I circled the two elements in each light. One is likely burned out in each bulb on the right side.

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Here are directions for replacing the bulbs. The remaining pics correlate with the directions.

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2006 Chevy Truck Equinox AWD V6-3.4L VIN F
Procedures
Vehicle Lighting and Horns Brake Lamp Brake Light Bulb Service and Repair Procedures
PROCEDURES
TAIL LAMP ASSEMBLY AND /OR BACKUP, SIDEMARKER, STOP, TURN SIGNAL BULB REPLACEMENT

REMOVAL PROCEDURE

pic 2

1. Remove the tail lamp bolt covers.

Pic 3

2. Remove the tail lamp bolts (3).

Pic 4

3. Pull outward at the front of the tail lamp assembly to disengage the retainers from the body side.
4. Remove the bulbs from the tail lamp assembly.
5. Remove the tail lamp assembly from the vehicle.

INSTALLATION PROCEDURE

pic 5

1. Position the tail lamp assembly to the vehicle.
2. Install the bulbs into the tail lamp assembly.
3. Push inward at the front of the tail lamp assembly to engage the retainers into the body side.

Pic 6

4. Install the tail lamp bolts (3).

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the tail lamp bolts to 2 N.M (18 lb in).
5. Install the tail lamp bolt covers (4).

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From memory, I believe the bulb you need is a 2057. The last pic shows what it looks like. Take the old one with you to a parts store to get one if your's looks different.

I hope this helps. Let me know if you have questions and if this fixes the issues.

Take care,
Joe

It shouldn't. Were you able to check for power to the light sockets or the bulbs themselves? I have to be honest, I have a feeling it is the bulbs. If you look at the attached pic, I circled a fuse, relay and then you will see two wires I highlighted and an arrow pointing down. Note that the fuse and relay send power to both rear parking lights. So, if the fuse or relay was bad, the left side wouldn't work either. The two wires and arrow simply are going to the rear tail lights.

If you can, check to see if there is power to the sockets for the parking lights. If there is, then chances are it is a bulb. If there is no power, then we have to trace the wiring back to the relay.

Here are a couple links you may find helpful when testing:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this helps or if you have other questions.

Take care,
Joe