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TalleresAMG Mechanics · Electronics · Programming EspañolES

Vehicle electrics

Vehicle electrics

Before condemning a control unit we check that power and data actually reach it. If a cable is broken or a connector burnt, the unit gets less than it needs and fails. Often the answer is not a new module: it is fixing what is there.

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Cables and looms

We rebuild branches with proper terminations, not tape and a knot.

Fuses and boxes

We replace the whole box when it burns, not just the fuse.

Grounds and corrosion

A loose ground gives the same symptoms as a dead module.

What we check before replacing a part

A module does not work if it gets no power, has no ground, or if the data line arrives dirty. That is why we measure before we condemn.

What we repair

  • Broken cablesFrom rubbing, a door that shuts badly or an accident. We rebuild the branch with a proper termination.
  • Melted or corroded connectorsThe classic burnt connector. We change terminals and seal against moisture.
  • Burnt fuse boxesIf the box has overheated we replace the whole box. Just changing the fuse wastes money.
  • Deformed fuse holdersHeat from a fuse that keeps blowing deforms the part. We replace the holder.
  • Loose or corroded groundsWe clean them, tighten them and add protection so they do not loosen again.
  • Burnt loomsWe repair the damaged insulation or replace the affected section with the same protection as original.
  • Phantom drainsWe find the branch that empties the battery while the car is parked.
  • Intermittent shortsWhen a cable rubs inside and only fails when the car moves.

When it is not worth repairing

We tell you before touching anything. If the part is too damaged, if it has been flooded with fresh water, or if there is nothing left to save, we will not make you spend money on a repair that will fail again. In that case we tell you what the new one costs and you decide.

How we do it

  1. Measure power

    We check current reaches the unit and the grounds are solid.

  2. Measure the data line

    We verify communication arrives clean and without drops.

  3. Repair what is broken

    Cables, connectors, relays or grounds. The part that is actually faulty.

  4. Check with the unit fitted

    We only replace the unit once the electrics are checked and good.

  5. Go out for a drive

    With the car running to confirm the fault is solved.

Frequently asked questions

Why check the electrics before the control unit?

Because a unit with no power or a loose ground behaves as if broken. If we replace the unit without checking the cables, the new one does the same and you have spent double.

Can a cable be fixed instead of replacing the whole loom?

If the damage is located and the rest of the loom is fine, yes. We rebuild the branch with the correct terminal and the same gauge. If the whole loom is burnt it is not worth it.

How much does a cable repair cost?

Normally much less than a new module. The price depends on the cable length and whether we have to open the steering wheel or dashboard. We tell you first.

Do you look at faults that only show in the rain?

Yes, that is one of the most typical signs of an insulation problem. Water in a connector makes contact and the fault appears. That is why branches have to be protected properly.

Shall we talk?

Get in touch

If you want a solution for your fault, contact us as soon as possible. Fill in the form, WhatsApp opens with the message already written and you just press send.

Fill in the enquiries and appointments form

Tell us what you need

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Vehicle electrics enquiry

No commitment. We tell you what can be done and what it costs.

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If the form does not work, message us directly: WhatsApp Angel, 665 65 64 57 or call us.