Said It Here

Can I splice wires to fix broken car lights with electrical issues?

When multiple exterior lights like headlights, taillights, and license plate lights fail simultaneously alongside underlying electrical problems, drivers are left trying to figure out whether to splice wires together or deal with a dealer warranty. This leaves them stuck with non-working lights and unsafe vehicles while trying to work around complex electrical failures.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    checking bulb sockets with a multimeter
  2. 2
    splicing the license plate lights into the rear running lights
  3. 3
    taking the car to a dealer to use the warranty
  4. 4
    checking every fuse with a multimeter and a visual check
  5. 5
    checking for kinked or damaged wires

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/MechanicAdvice2 people · September 2026 – October 2026

“My license plate lights will not turn on despite being fresh bulbs.”source ↗

“Can I splice the license plate lights with the rear running lights?”source ↗

imnevernormal · r/MechanicAdvice · 1 upvotes

“The headlights (Hi and Lo Beam), Taillights and Brake Lights all DONT work at all,”source ↗

BaggedCorolla · r/MechanicAdvice · 1 upvotes

Where this came up

People with this problem also raised