Temperature guage

[coxy123]

I have been unable to locate the sender wire at gauge end. If I ran a new wire , does it have to be a certain thickness/type of wire.

[Clive]

Not really. I don't know what current flows, but I bet it is well under 3A. 

Not sure what car you have, but most have 10V stabilised supply. Green wire (possibly with a trace colour) from memory. Stabiliser is on teh back of the speedo.

[Nigel Clark]

The sender should have a resistance of about 60 ohms when hot, much higher when cold. With nominal 12 volts, the maximum current flow would be 0.2 amps, very low, so as Clive says almost any cable will suffice.

By the way, the original sender wire should emerge from the wiring loom with the alternator or dynamo wires, as the main loom runs forwardalong the left side  towards front lights.

Nigel

[coxy123]

its a 1500 spitfire. The light green/live wire is there but nothing on the other connection. Haynes manual says its green/blue. cant see it in the mass of spaghetti behind dash.

Dont mind running a new wire, just wasnt sure of wire thickness

[coxy123]

Thanks for your help. Thats tomorrows job sorted

 

[Nigel Clark]

Sorry, should have read 'gauge end', was thinking of the engine end.

 

[coxy123]

Found the wire behind dash. all works great now. Thanks for your help