Hi

I have been getting a few electrical problems since I changed my heater core/matrix yesterday, all relating to the clocks, my fuel gauge is reading full (i know for sure it isn't actually full) my speedo doesnt work but the mileometer does, my rev counter doesnt work
My temp gauge and all of the other dash lights working fine.
I have checked that the earths and the connections at the rearof the clocks and all seem fine, would there be a particular plug that all these faults would be associated with???
Any help would be appreciated