Instrument voltage regulator?

[Roo]

I have just bought 1969 Taunus, German import. The fuel and temp gauges are off the top off the scale but the earth's are good so guessing it's the voltage regulators on the back? Does anyone know what sort of regulator's they might be or know of a retailer who may be able to supply me with a couple?

 

Any help would be cracking!

 

Cheers

 

Roo

[285Andy]

might the car have been converted from positive to negative earth? as this has the same effect on certain gauges. although im really not familier with the taunus at all so please feel free to shoot me down lol!