Brake lights work but tail lights don't - what could be the issue?

Car Maintenance & Repairs
1

I’ve noticed something odd with my vehicle recently. The brake lights are functioning perfectly, but the tail lights just won’t turn on. It’s really puzzling because I assumed if the brake lights work, the tail lights should too since they usually share some wiring.

Has anyone experienced a similar issue?

Here’s what I’ve checked so far:

  • Fuses: I looked at the fuse box, and the fuses related to the tail lights seem okay. But I’m not entirely sure if I checked the right ones.
  • Connections: I visually inspected the wiring connections at the tail light assembly, and everything looks intact.
  • Bulbs: I replaced the tail light bulbs, thinking maybe they just burned out.

What I’m thinking:

  • Could it be a wiring issue that only affects the tail lights?
  • Should I check for any grounding problems in that area?
  • Is there something about the brake light switch possibly affecting the tail lights?

Any input or suggestions would be greatly appreciated! Thanks in advance for your help!

8 Likes
2

It sounds like there might be an issue with the wiring or connectors. Tail lights and brake lights often have separate circuits. A short or damaged wire could be the culprit.

3

Thanks for the insight! Could it also be a problem with the tail light relay or fuses?

4

Definitely check the fuses! A blown fuse could cause your tail lights to stop working while the brake lights function normally. It’s an easy fix!

5

Isn’t it interesting how such a small part can cause so much trouble? A quick check of the fuses could save you a lot of time!

6

Usually, if the brake lights work, it rules out the switch. It could be damaged wiring specifically for the tail lights or a connector issue, like corrosion.

7

Good point! I’ve had issues before where the wiring was frayed. It’s worth a look for sure.

5 Likes
8

Have you checked the connectors? Sometimes they just need a clean or a wiggle to make a better connection. It’s amazing how often that’s the case!

9

Haha, you might be onto something! I’ll try that before digging deeper.

4 Likes
10

Also, if the problem persists, consider consulting a professional. Sometimes what looks like a small issue can be more complicated, like wiring harness problems.

11

Absolutely! But let’s be honest, most of us have hesitated to call a mechanic, thinking we can fix it ourselves and then end up with a big mess! :joy:

12

So true! But hey, at least we learn something in the process, right?

13

Remember to stay patient while troubleshooting. It can be frustrating, but you’ll get to the root of the issue eventually!

4 Likes
14

If your brake lights are working but the tail lights aren’t, check your fuses first. A blown fuse can prevent the tail lights from functioning even if other lights work fine. It’s usually located in the fuse box under the dashboard or hood.

15

That makes sense! And if the fuses are good, you might want to look into the relays. They control the power supply to different lighting circuits and can fail occasionally.

16

Checking fuses can be a bit tricky. Make sure you have a fuse puller or needle-nose pliers handy. You can visually inspect them or use a multimeter to check for continuity.

17

True! I once had a fuse that looked fine but was actually blown. It’s worth checking with a multimeter for sure!

18

Don’t forget about ground connections! Sometimes a poor ground can affect the tail lights. Make sure all wiring is intact and connections are clean.

19

Great point! Bad ground connections can definitely cause issues. Has anyone dealt with rusty connections or corroded wiring?

20

If the issue persists even after checking the fuses and relays, it might be a wiring issue deeper in the system. Just an idea; could save you a lot of troubleshooting time.