Both the fuel gauge and the temp gauge have a green wire in common between them. This wire can be broken or loose. There where this green wire is connected to the fuel gauge there is at the same time a green wire which goes to the fuse box. This wire can be broken or loose too. Finally you could check the fuse itself (fuse no 4).
Hello everyone, I have a series 3 sunbeam rapier and just recently the fuel gauge and water temp gauge stopped working fully. Any Ideas what it could be, I know the Series 3 does not have a voltage stabilizer but I am lost on what to do to fix it. Thanks in advance.