dash problems

[jaywalker]

hi there, i have a digidash fitted to my 2.0 16valve nova gsi, i have re-wired it many times but still cant cure a fault, everytime i touch the brake pedal the rev counter stops working, also when i drive down the road its saying im doing 100+ mph when im doing about 10-15 max, also keeps switching to mph/kph all the time, i thought it was a dodgy dash or wiring was wrong so i bought the other type of dash but thats exactly the same so i know it must be the wiring or something else, i have even had the wiring done twice and heat shrunk the connections when mating the looms together to see if this was the problem, any ideas will be gratefully received or even someone who is local to wolverhampton who could have a look would be great,

cheers jay

[Southie]

Sounds like it could be your transponder thats faulty. Have you tried another one?

[Johnny A]

With silly random electrical gremlins like this the very first things I always check are all earthing points.

[Damo]

With silly random electrical gremlins like this the very first things I always check are all earthing points.

Yea check all your earths mate think theres one behind the clocks isnt there?.

[jaywalker]

cheers guys will have a look, jay

[vaughanmc]

Mine used to jump between MPH and KMH but it doesn't seem to now - Just kinda went away and it's been working spot on ever since