Re: EF dash earth problem electrical storm damage
Ok...seems no-one answered my call I will reply to myself.
The problem was an electrical storm Spiked the ECU and the instrument cluster processors. There was no visual signs of lightning or any burnt smell ...just the units were tested and were dead. Both were replaced under insurance.
The speedo needle was a part of the instrument cluster problem. The signal from the tranny sensor goes to the instrument processor. As the processor was dead, the tranny went into Limp Home Mode (locked in third gear).
In terms of the low amperage coming through the Brake fail circuit....It turned out being the bulb filaments that acted as a resister thus reducing the current. So this was OK. Thanks.