Allspark Auto Electrical

Below are just some of the more common faults we’ve come across along with solutions provided.

Please note that we cannot accept liability for any damage or injuries received or inflicted as a result of any repairs attempted.

We can now re-code or bypass MG/Rover Immobilisers.

Please contact us for more information.

The window/door control module is built onto the bottom of the drivers door window motor. Due to its mounting location and angle, water can penetrate the connector and cause shorting.

You’ll know straight away if this is the culprit as when you disconnect the plug, orange water will usually run out of the joint.

Examine the pins and receivers for corrosion damage. If you’re lucky and

you catch the problem soon enough it should clean up with some WD40 and a toothbrush.

Once the door card is removed, The motor/control module is easily identified.

Evidence of moisture ingress here as yellow/green powder on multiplug connection

If you find you have no power to the ignition circuit, no warning lights on the dash etc. it would be very easy to assume that the immobiliser has developed a fault. There is an additional megafusebox hidden under the carpet in the drivers foot-well. One of the fuses contained therein governs power to the ignition and fuel pump circuits. It’s an absolute swine to get at and requires the drivers seat be removed. If one of the fuses has blown, check the megafusebox in the boot as some models often have redundant ones there that can be utilised.

A poorly fitted replacement windscreen can result in water leaking down the firewall. There are 3 wiring loom connector joints at the bottom of the firewall on the passenger side that with water ingress can short resulting in a variety of intermittent faults and battery drain conditions. Evidence of this problem will be lots of water under the carpet in passenger side front and rear foot-wells. The leak must be cured before thoroughly drying and cleaning the joints to resolve the faults.

Mk3 onwards: If your fitting an after-market radio in one of these you may have a problem finding an ignition switched live feed. As with many modern cars the switched feed has been replaced with a pulsed feed which won’t work an after-market radio. An ignition switched 12v feed can be found at a relay holder (vacant on some models) on the fusebox behind the glove compartment.