Trailer Wiring with Overload Protection
Would an unexpected repair bill of one to two thousand dollars be welcome?
The consequence of connecting an incorrectly wired or faulty trailer could result in major damage to your vehicle’s electrical system. For example, the cost to replace a BCM (Body Control Module) on a Mazda6 is more than $800.00RRP and over $1500.00RRP on a Mazda3, just for the parts.
Shown below is what has occurred to the BCM on a near new Mazda6. This damage is not only costly, but places you in a position where safety could be compromised, risk a traffic infringement, not to mention the inconvenience of vehicle recovery.
Mazda New Zealand has developed a trailer wiring harness for Mazda3, Mazda6 and CX-7 with a primary function of circuit overload protection to prevent damage to the vehicle’s electrical system and control units. The harness has the additional benefit of being easy to install and has the option of mounting the flat trailer plug either internally or externally.
Once fitted the Overload unit prevents feedback to the vehicle’s control modules and related fuses, by taking its power supply from the boot light. If a fault does occur, power is cut to the affected circuit only, and restored once the circuit has been repaired.
Example: If the left hand indicator on the trailer is shorted to ground, the trailer brake, tail and right-hand indictors will still operate, also all the lights on the vehicle will operate completely unaffected.
Mazda strongly recommends that all applicable Mazda’s are fitted with an overload protection wiring harness to protect owners from unexpected repair costs.