FixHeadlight or Brake Light Not Working — What It Usually Is
A dark headlight or brake light is the most ticketable defect on a car — and usually one of the cheapest to fix. Bulbs dominate; wiring and switches mop up the rest.
What it actually turns out to be
| The fix involved | Share of visits* | Typical cost† | Median |
|---|---|---|---|
| Bulb | 68.2% | $38 – $146 | $73 |
| Light Assembly | 8.3% | $58 – $262 | $130 |
| Switch | 7.2% | $126 – $344 | $216 |
| Headlight | 7.1% | $60 – $272 | $131 |
| Fuse | 3.3% | $56 – $239 | $115 |
| Other, rarer causes | smaller shares | varies | — |
*Share of visits whose repair involved this part. Combined repairs count toward each
part involved, so shares overlap and don't add up to 100%. Among visits that ended in a parts repair.
†Middle half of real invoices (25th–75th percentile) when this was the only fix — parts + labor, all vehicle types.
Specific versions of this problem
Some flavors of this complaint point at different parts — each of these pages has its own odds and real repair reports:
Real repair reports
These are recent, paid visits for this complaint — the words as the owner said them, and what it turned out to be.
Car owners said
“-driver tail light inop”
“Passenger side headlight is out”
“Right Front Headlamp Out”
“License plate lights inop”
“RF Turn Signal Socket”
“Blinkers do not work”
What the technician found
“-rear passenger brake light inop -adjust rear backup camera”
“Lr turn signal not working. front flashes fast ====”
“Customer states- license plate lights inop - installed new sockets, and housins as they were missing”
“CUSTOMER STATES : Right rear bulb is blinking fast”
One light out
A single dark lamp is almost always the bulb. The part is cheap; on some vehicles the labor isn't, because reaching it means removing bumper or fender liner — that's what varies the price.
Both brake lights out with the third working
The center high-mount light runs its own circuit — both mains dark with it lit points at the brake-light switch at the pedal, not two coincidental bulbs.
Flickering or dim
Flicker and dimness are connection problems: corroded sockets and grounds. Repeated bulb burnout in one socket is the same story — replace the socket, not the fourth bulb.
Costs by vehicle
- Light Bulb: Ford F-150 · Toyota Camry · Chevrolet Silverado 1500
Take this to the shop
The FixDozer Diagnosis Brief puts this page on one printable sheet: what this complaint usually turns out to be, how often, and what each fix should cost — so when the diagnosis comes back, you already know whether the number fits.
Download the Diagnosis Brief (PDF)View it online · Narrow it down for your vehicle