Gps Plot Point / Speed Sensor

Hey all,

I created a thread only a few hours ago in Audio/Visual about my after market head unit possibly causing problems, but it might not be that.

I have a speed sensor issue. It seems that between the speed sensor at the wheels and gearbox there is a problem, however it could be related to my GPS Plot Point. Apparently this is fitted in all premo sound fords but isn't always connected, and if this is spliced into for power, or completely disconnected, it can cause speed sensor issues. These issues range from the car running like sh*t, to the battery light coming on on the dash.

Now, get this - a few times my speedo has just died, and it recently did this at the auto eleci today too. Now, when he noticed the speedo had died, he did some more test - the car ran perfectly. No battery issues, no coughing and farting, ran like a dream. Turned the car off and back on, the speedo was working again, and it ran like sh*t.

What the f*ck is going on? Im getting so over this car lol.

Thanks for any help guys.