Model 3/Y: daytime running light dead, vcfront_a580 HeadLight EFuseTrip

Symptom

On a Model 3 from 2018 the “eyebrow” on the right headlight stopped lighting up. The low beam works, the position light works, the daytime running light LED strip is dead. In Service Mode, in the Alerts section, the code vcfront_a580_rightHeadLightEFuseTrip is hanging there (chat message). For the left side the code reads the same, with left.

What the code means

VCFRONT, the front body controller, feeds the headlights. There is no ordinary blade fuse in that circuit, there is an electronic one: when the current goes over the limit the controller cuts the line itself and logs the trip. The EFuseTrip part of the code name is exactly about that.

According to the tesware and myteslamate alert databases the record clears after a sleep cycle, after a reboot, or after a successful attempt to power the circuit again. If the code comes straight back, the overload is live and the car has protected the line once more.

The code speaks only about current in the circuit. Which part raised it, the code does not show, so separating the wiring from the headlight itself is hands-on work.

What owners found

Two cases in the chat, and neither ended with a headlight assembly.

In the first, the LED strip is driven by a separate module that sits in the end of the headlight. It comes out and is replaced separately from the headlight, with another headlight serving as the donor (discussion, continued).

In the second, a damaged wire to the headlight was shorting and produced exactly the same e-fuse. The wiring was replaced, the fault went away, the headlight turned out to be healthy (message).

The order of checks

1. Write down what exactly went out: only the daytime strip, only the low beam, or the headlight as a whole. That decides which part of the headlight electronics to suspect.
2. Go into Service Mode, open Alerts and copy the code out in full, with the side. You will have to search for it word for word later.
3. Put the car to sleep or reboot it. If the code comes back within minutes, writing it off as a glitch is no longer an option, go looking for the short.
4. Inspect the wiring from the front controller to the headlight connector. Pay particular attention if the bumper has been off, there was a front impact, or the car recently dived into a deep puddle. One owner had a headlight go out right after a puddle, with the wiring outwardly intact (message).
5. Swap the control module over from a headlight you know is working. It sits on a housing with a heatsink and is held by four screws, so the check takes minutes. On pre-refresh Model 3 these modules die regularly: one person went through two right-hand ones and one left-hand in five years (message). A diagnosis of “the headlight has died” often falls apart after a swap like that.
6. Only after all that start counting the money for a headlight assembly.

If the headlight does get replaced

Per the Tesla manual a headlight replacement on Model 3 starts with the front bumper coming off, then the connector and two bolts at 5.9 N·m. Book time is 0.72 hours. The same procedure covers the firmware reinstall and the beam adjustment.

These steps cannot be skipped. After someone else’s headlight goes on, or after the lens is replaced, the car throws a fault and the projector will not light until the headlight is paired to the car; a Software Reinstall on its own does not cure it, the pairing plus the reinstall are both needed (message, continued).

Adjustment on a 3/Y with a projector is done in software, there are no physical adjusting bolts on the headlight. The reference from the manual: 7 m to the wall, mark at about 69 cm, with the left headlight aimed lower than the right from the factory.

What it costs

Nobody in the chat named figures for this particular repair, so we are not going to invent them. There are fresh Minsk rates for opening a headlight up, though they are for a Model Y matrix unit (September 2026): unglue and reglue the headlight 300 BYN, unglue a donor 100 BYN, transfer the driver and the light guide 50 BYN, with the bumper off 600+ BYN. A pre-refresh 3/Y headlight is simpler inside and the work involved is similar, so the numbers land in about the same range.

The gap against the official route is noticeable here: swapping a module or repairing wiring fits into a hundred or two rubles, while a headlight assembly plus the manual’s labour already runs into hundreds of dollars. Workshops that take on headlights are collected in the service directory.

How this differs from matrix headlights

On pre-refresh 3/Y the headlight is ordinary LED and the daytime strip works through reflectors. On matrix headlights (S Refresh, X Refresh, Highland, Juniper) the picture is different: dozens of controlled pixels, separate drivers inside the housing, known software bugs with flicker and DRL failure after updates. The symptom looks similar from outside, and getting in there is a different job. Details are in the article on Matrix LED headlights on S/X Refresh and Highland/Juniper.