Fiat punto 55 S rear heater wont work, heater fine but power to heater goes into current limit when connected to heater. I am told there is a relay somewhere?? which powers the heater but I have been unable to find it.

Mukesh Rana, July 2007

Check the connectors on the base of the tailgate and the plate it connects to. This is where the rear screen demist is powered from. they are on springs and they sometimes brake after a lot of use or the plug under the plate burns out if it has been wet. Can't remember off hand if it is the 2 or the 4 connector that powers the screen demist but it is easy enough to check both.
Alternatively the wires that fasten to the glass may have become damaged or the lines on the glass may have all been scratched so the current can't flow through.

Rachel, July 2007