Electrics
10 article(s) on «Electrics». Sorted by severity — most severe first.
Tesla HV battery pyro fuse: why it fires at DC chargers and what a replacement costs
The pyro fuse breaks the battery power circuit instantly, and once it has fired the car will not move. The 2026 wave of cases around unplugging from DC stations, the symptoms, the two revisions of the part and the “schedule a replacement” message, Belarusian prices (750-936 BYN for the work) and what happened after the original part jumped in price.
12V (16V) battery: bricking and recovery
The 12V battery is a frequent cause of a fully bricked Tesla. How to jump-start, replace, and which alternatives fit.
High-voltage isolation fault: where it comes from and how the leak is found
Tesla's HV system runs at 350–800 V, and onboard monitoring watches the isolation constantly. Where current leaks to the body come from (moisture, road salt, aging, accidents), what an isolation fault threatens (from power limiting to a full no-drive lockout), and how a shop localizes the leak with a megohmmeter. Prevention tips for the Belarusian climate.
Model S/X MCU1 (Tegra): eMMC wear — prevention and recovery
Classic MCU1 issue: 8 GB eMMC wear → black screen/glitches, connectivity/charge issues. Better to preventively swap the chip for 64–128 GB.
Model 3/Y: daytime running light dead, vcfront_a580 HeadLight EFuseTrip
The daytime running light “eyebrow” has gone out on one headlight and Service Mode is holding vcfront_a580_rightHeadLightEFuseTrip. What the front controller’s e-fuse is, why it trips, and two cases from the chat that closed without replacing the headlight assembly: a separate module in the end of the housing, and damaged wiring.
Replacing Tesla control modules: why nothing works without VIN pairing
Every Tesla control module, from the BMS to the airbag module, is paired to the VIN of a specific car. You can't just 'plug in' a new or used module: without the pairing procedure errors pile up, all the way to the car refusing to drive. Which modules require pairing, how a used module differs from a new one (unpairing from the previous car, 3-6 h) and what the procedure looks like.
Tesla charge port won't open or close: motor and latch failures, error fixes (2026)
Tesla charge-port problems after 100-150k km: door won't open from the app, won't close after charging, the screen shows 'Charge port latch not engaged' with a flashing orange logo, or the latch jams the connector in. Which assembly fails first (door motor vs latch pin), the replacement parts and procedure, typical repair cost.
Tesla matrix LED headlights: flicker, dead pixels, burnt segments — repair vs replace (2026)
Matrix LED problems on Tesla Model S Refresh (late Feb 2022+), Model X Refresh (June 2023+), Model 3 Highland (late 2023+) and Model Y Juniper (2025+): high-beam flicker on the highway, dark holes in the beam pattern, full-segment failure, 'Headlight system fault' on the cluster. Which symptoms are software bugs that firmware fixes, which are driver-chip burnouts requiring a full headlight swap, and why US cars had matrix hardware but no adaptive function until 2024.
Window regulator not working — diagnosis and repair
Window regulator fails: window won't go up or drops on its own. Calibration, reboot and mechanism replacement.
Tesla keys: Key Card, Phone Key and the fob — the 19-key limit, pairing and losing all keys
How the three Tesla key types work (NFC card, phone over Bluetooth, fob), why up to 19 keys can be paired to one car, how keys tie into driver profiles, and what to do if ALL keys are lost: restoring access via the immobilizer with proof of ownership. Plus the mandatory step after buying used.