That way will get it working as a temporary fix but better to find and correct the actual problem. Many of us (fortunately mine is original and working) have run PO wiring bodges when trying to run down electrical problems and it is tempting to do the "quick fix" but finding the real problem and fixing it gets the real sense of satisfaction. If that means taking off the dash to get at/trace wires, that provides the opportunity to clean all connectors under there right down to cleaning the copper oxide off the instrument plastic circuit strip and all bulb contacts. Not something you would want to do mid season, more of an off season job as it is time consuming but then you only have to do it once.
- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT