Answer
Jul 14, 2025 - 08:06 PM
First, a few things to consider:
- Tail lights often share a fuse with other systems like dash lights or running lights — so the fuse might not be labeled directly as "TAIL LIGHTS."
- On many vehicles, the tail light fuse is in the interior fuse box, not under the hood.
Try to check the fuse boxes. Most vehicles have two: under the hood and under the dash. Then look for fuses labeled:
- “TAIL”
- “PARK”
- “ILLUM” / “ILLUMINATION”
- “EXT LPS” (Exterior Lamps)
If unsure, check the owner’s manual or fuse diagram on the fuse box cover.
Next, inspect fuses visually or with a tester. A blown fuse can look fine at a glance — use a multimeter or test light if possible. Check the tail light bulbs. It sounds obvious, but both bulbs can burn out and cause this exact issue. Remove one tail light lens and inspect the bulbs manually.
After that, check for a bad tail light relay (if equipped). Some vehicles use a relay for the tail or parking lights. Swap it with a similar relay (like the horn relay) to test.
Lastly, look for a bad light switch or dimmer. If all other lights work but the tail lights don't, the headlight switch (which controls the tail lights too) may be faulty.
Hope this helps!
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