A warning light back on a day after it was cleared. A battery flat again on Monday morning. Lights that dim at idle, or a car that started behaving oddly after a wet drive. We plug in, read live data at each module, then follow the fault back to the pin it started at.
If the battery itself is what needs testing or replacing, that sits on our tyres and battery page. This page is the electrical side of the same problem.
The two meet when a new battery goes flat again. A healthy battery that keeps dying is either a charging fault or something still drawing current after you lock the car, and that is the work traced here.
Electrical faults rarely announce what they are. They turn up as a light, a dead circuit, or a car that will not start on the one morning you are already late. Pick whichever sounds closest.
Engine, ABS, airbag or traction. Somebody cleared it, the light went out for a day, and now it is back. We read the pending codes as well as the stored ones, because a pending code often names the fault the car has not fully committed to yet.
Get the codes read → 02Parasitic drain, and it is one of the few faults that comes with a number attached. We clamp the negative terminal, wait for the modules to go to sleep, then pull fuses one at a time until the reading drops and the circuit gives itself away.
Book a drain test → 03The starter might be drawing badly. It might also be an alternator that never put the charge back in, or voltage lost across a corroded main earth strap. Cranking voltage under starter load and alternator output both get measured before anyone orders a part.
Test the starter and alternator → 04Usually a poor earth, a tired relay, or wiring worn through where the loom crosses a door, the bonnet hinge or the boot lid. Each circuit gets tested at the connector, the fault gets photographed, and the report names the piece that is doing it.
Get the lighting checked → 05Singapore humidity finds every connector that has lost its seal. Water bridges two pins, a module reads nonsense, and the fault appears to cure itself once things dry out. The corrosion stays behind. We hunt the entry point, clean and re-grease the earth, then re-test.
Report a wet-weather fault → 06A window that stopped on one door only, central locking that skips a corner, mirrors that will not fold, a parking sensor gone quiet. It is a fuse, a relay, a switch or a broken wire inside a door boot. We work out which of the four before anything gets replaced.
Trace the dead circuit →Take a code that reads as an oxygen sensor. It can be the sensor. It can also be the wiring to it, the connector, the earth that circuit shares with something else, or the module doing the reading. Five different bills, and only one of them is your car. Fit a sensor because the code said sensor and you are paying to find out whether the guess was right.
So the scanner goes on before any spanner does, and it talks to every module in the car rather than the engine alone. What comes back is not an answer though, it is a shortlist. A reading that looks wrong still has to be proved wrong, and proving it is where the time goes.
After that it is auto electrician work and it is slow on purpose. Multimeter on the circuit, voltage drop measured across the suspect run, connectors opened and looked into, the loom followed by hand to wherever it flexes. When the quote arrives it is for the thing we found. If you would rather read first, what a check engine light actually means works through the same logic.
Hot or cold, wet or dry, at idle or on the move, once or every morning. An intermittent fault is found by its pattern more often than by the scanner.
The scan does not stop at the engine. Comfort, body control, airbag, ABS and transmission are all read, and every code found, stored or pending, goes into your report with its freeze-frame data before a single one is cleared.
Sensor readings taken with the engine running, then held against the figure your model is supposed to show. Anything sitting outside it gets followed back to where the reading comes from.
The battery is measured at the terminals, then the charging side around it: how far voltage drops while the starter turns, what the alternator puts out at idle and at revs, and how much current is still leaving once the car is locked.
The part of the job done by hand. Every place the loom bends or rubs gets felt along, plugs and splice taps come apart to be looked into, and an earth that has gone weak is cleaned up and tested again.
Readings, photos and what each one means, written up in plain English. You decide from there what gets fixed now and what can wait.
Car electronics are networked now, so a fault in one module often shows up as odd behaviour somewhere else entirely. All six areas get covered even when you booked because one window stopped working.
Full ECU scan across engine, transmission, ABS, airbag, body control and comfort modules. Stored and pending fault codes documented with their freeze-frame data. Live data captured for anything the scanner flags. Multi-brand coverage across European, Japanese and Korean makes, read down to module level, with the findings written into your report in plain English.
Resting voltage and state of charge measured at the terminals. Cranking voltage drop tested under starter load. Alternator output verified at idle and at higher RPM. Whatever is still drawing current after the car is locked gets measured rather than guessed at. Singapore heat shortens battery life, so we tell you honestly how much service window is left rather than waiting for it to strand you.
Live sensor readings cross-checked against manufacturer reference values, with anything out of range isolated and traced back to source. Actuator commands tested where it is safe to run them, cooling fan, throttle body and ignition coils among them. Visible sensor damage or wiring chafe gets photographed and goes into the report.
Car wiring spends its whole life being flexed, heated and rained on, so this part is hands-on: doors, bonnet hinge, boot and the engine bay loom. Splice taps, bullet connectors and factory plugs inspected for corrosion, including the ones a previous shop wrapped in tape. Weak ground points cleaned and re-tested. Water ingress entry points hunted down, which in this climate is half the job.
Headlight, fog, indicator, brake, reverse and interior lights all tested. When a circuit fails, bulb, fuse, relay and switch get isolated one at a time instead of replaced in sequence. Headlight aim and beam pattern checked where there is a complaint. Adaptive and matrix LED systems supported on cars fitted with them.
Aircon controls, central locking, power windows and mirrors verified. ABS, airbag, traction control and parking sensors tested. Key fob range and the door receiver checked when the fault comes and goes. Everything lands in a written summary with photos of anything we flagged along the way.
Drivers turn up having been told the whole car needs rewiring, and that word is worth slowing down on. Wiring gives out at the spot it is worked hardest, so what usually sits behind the fault is one worn run or one connection gone green, not a car full of them.
That is why the hands-on part of the check goes to the flex points first. Your report names the run or the connection actually doing it and says what it needs, so the size of the job stops being anybody’s guess before you have agreed to anything.
Not every electrical fault is urgent. Some of them stop being an annoyance and start being a car that does not move, and the line sits at whether it can strand you or change what the car does at speed.
If you are in the second column, say so when you book your next service and we will read the modules while the car is in anyway. What we would not do is keep clearing the same light and sending you off. Which dashboard symbols mean stop now is worth two minutes if you are not sure which column yours belongs in.
A dealer and an independent workshop will both fix an electrical fault in the end. What differs is how the visit goes and what you walk out holding.
Step into the bay and stand beside your car while it is on the scanner. The quote comes itemised line by line with a photo of the actual fault attached, before any work starts. At a dealer you get the customer lounge and a service package with the items bundled into one figure.
OEM, OE-equivalent or aftermarket. You pick and we advise, rather than manufacturer parts being the only line on the sheet. A part you sourced yourself is welcome too, and the FAQ below sets out what changes when you supply it.
Most electrical diagnostics take one to two hours and slots are usually the same week, against one to three weeks of lead time at a dealer. You message the mechanic working on your car instead of a service advisor, and the same mechanic remembers it next time. Pickup and drop-off runs islandwide with a couple of days’ notice, and we check in on WhatsApp two weeks later.
Cars still inside their manufacturer warranty are welcome here, and bringing one to an independent workshop does not put that warranty at risk. Singapore’s competition regulator has told authorised dealers to drop warranty terms that tie you to their own workshops, and the conditions that still apply are spelled out in the FAQ further down.
Ubi sits practically next door, and Bedok, Eunos and Paya Lebar are only a few minutes further out. Message us on WhatsApp with what the car is doing and when it does it, and you will get a straight answer on whether it needs a bay this week.
Clearing a code switches the light off and leaves the fault exactly where it was. The car runs its own self-test on the next drive cycle, finds the same problem and turns the light straight back on. That is why the circuit gets traced first and the code gets cleared last, once the cause has been dealt with.
Worth checking, yes. Water that has bridged two pins usually lets go once everything dries out, so the light may clear on its own and the problem looks solved. It is not. The corrosion left on the contact faces keeps spreading, and the same fault comes back, normally after the next heavy rain. Bring it in while you still remember which drive brought it on, because that narrows down where the water is getting in.
Yes, but not at the level people expect. Once every module has gone to sleep a healthy car settles at roughly 25 to 50 mA, so a drain that flattens a battery overnight is far larger than that, usually several hundred milliamps or more. The usual culprits are a boot lamp that never goes out, a dashcam wired to a permanent live feed, an aftermarket alarm, or a module that refuses to go to sleep. Which one it is only shows itself after the car has been left alone long enough to settle, so this is not a test that can be rushed through in five minutes.
Yes. Our scanners cover BMW, Mercedes-Benz, Audi, Volkswagen, Porsche and Volvo, and on these cars that counts for more than it does elsewhere. A generic code reader only talks to the engine, so plenty of European faults never appear on one at all. Ours reach the body, comfort and safety modules too, which is exactly where the awkward ones tend to sit.
Usually the alternator is not putting out enough at idle, or an earth connection at the headlight has gone high resistance. We measure alternator output at idle and at raised revs, then check ground continuity to work out which of the two it is. A tired alternator often shows itself here first, well before it leaves you stranded.
Almost certainly not, and anyone who opens with that word should be asked to show you the damage first. Rewiring a whole car is a job for fire, flood or widespread rodent damage, and those come along rarely enough that a workshop can go years between them. Everything else is a section repair, which is a fraction of the work and leaves far more of your original wiring in the car.
It can be a flat fob battery, a worn receiver in the door handle, an antenna fault, or the fob losing sync after its battery was changed. Each one gets tested in turn, and we reprogram the fob if that is what it turns out to need.
Usually one to two hours for the full scan plus a written report. An intermittent fault takes longer, because the car has to play up in front of us before there is anything to measure. You get the time estimate before we start.
For supported brands, yes. Where a replacement part needs coding to the car, battery registration, throttle body adaptation, key coding or sensor calibration for instance, that is part of the job rather than something you arrange elsewhere afterwards. If a car needs manufacturer-level coding we cannot run in-house, you hear it before we start.
Yes. We check it first to confirm it fits and is the right spec for your car. Labour is charged the same as it would be with our part. If a part you supplied fails early the warranty sits with whoever sold it to you, and we will say so if we think a different part would do the job better.
No. Singapore’s competition regulator, the CCCS, has told authorised dealers to drop warranty terms that force you to service only at their own workshops, so you can service or repair at any qualified workshop without losing the manufacturer warranty, as long as compatible parts are used and the manufacturer’s procedures are followed. We do both, and your written report is the record of it.
All brands sold in Singapore. Toyota, Honda, Nissan, Mazda, Subaru, BMW, Mercedes-Benz, Audi, Volkswagen, Volvo, Porsche, Lexus, Hyundai, Kia and MINI among them, and our scanners cover the lot.
Full general servicing at recommended intervals. Plain-English report every visit.
Learn more →Tyre fitting, alignment, balancing and battery load testing. Singapore heat kills batteries fast.
Learn more →Diagnostics, repairs and overhauls. We trace the real fault before quoting major work.
Learn more →Pad and rotor thickness measured in millimetres, calipers and fluid tested, photos before any quote.
Learn more →Knocking over humps, a floaty ride or uneven tyre wear. Checked on the lift and on a road test.
Learn more →A patch on your lot or a level that keeps dropping. We find the source before quoting.
Learn more →Buying used? You get the verdict before you commit.
Learn more →24/7 islandwide towing for breakdowns and accidents. Direct line to a real driver.
Learn more →
A flashing light and a steady one mean different things. How to tell them apart.
Jump it safely and in the right order, then find out what actually flattened it.
The warning signs that turn up weeks before a battery leaves you stuck in a carpark.
Why an independent workshop can do your electrical work without touching your warranty.