Battery Cable Replacement

A car that starts intermittently on a battery that keeps testing fine is usually a cable or earth fault.

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Service Info

Typical Duration 1 hour
Diagnostic Required Yes

We test the starting and charging circuits for voltage drop to locate the poor connection, replace the affected positive lead, earth strap or terminals with correctly rated parts, then re-test the circuit under load.

Skip the garage, our master mechanics come to you

At your home or office
Fair & transparent pricing
6-month, 6000km warranty

The Most Trusted Mobile Battery Cable Replacement

A car that sometimes starts and sometimes does not, with a battery that keeps testing fine, is very often a cable problem rather than a battery problem. Corroded terminals, a frayed positive lead or a poor earth strap to the body will all starve the starter of current. Michanic replaces battery cables at your home or office.

Why Choose Our Mobile Battery Cable Replacement Services?

Battery cables are one of the most commonly misdiagnosed faults on a car. The symptoms look exactly like a dying battery, which is why many drivers replace the battery first and stay stranded. Our mechanics test voltage drop across the cables under load, which shows up a bad connection that a simple battery test will miss.

Why We’re the Best Choice for Mobile Battery Cable Replacement

We replace the affected lead or earth strap with correctly rated cable and proper crimped lugs, not a temporary repair that will corrode again within months. Terminals are cleaned and protected, and we re-test the starting circuit under load before we leave.

Battery cables are one of the most commonly misdiagnosed faults, because the symptoms look exactly like a dying battery. Drivers fit a new battery, then find themselves stranded again.

Frequently Asked Questions

  • How do I know if my battery cables are the problem?
    Typical signs are a car that starts intermittently while the battery keeps testing fine, terminals that look powdery or corroded, and lights that dim heavily when the key is turned. A voltage drop test under load confirms whether the cables are at fault.
  • What causes battery cable corrosion?
    Corrosion is caused by acid vapour from the battery combined with heat and moisture. It appears as a white or blue-green powder on the terminals and works its way into the cable strands, adding resistance that starves the starter motor of current.
  • Can corroded terminals be cleaned instead of replaced?
    Light surface corrosion can be cleaned and protected. Once corrosion has crept under the insulation into the cable strands, cleaning the outside does not restore conductivity and the cable itself needs replacing.
  • Why does a bad earth strap cause starting problems?
    Current has to return to the battery through the earth strap. If that return path is corroded or loose, the whole starting circuit is restricted no matter how good the battery and starter motor are. A poor earth also causes odd, seemingly unrelated electrical faults.
  • Can a faulty battery cable damage other parts?
    Yes. High resistance makes the starter motor and alternator work harder, generates heat at the connection, and in bad cases melts insulation. It can also cause the charging system to over-charge or under-charge the battery.