hi all,need senders for my oil and water temp gauges,looked on e bay and some are single wire and some are twin ,whats the difference,and how do i work out which to buy,thanks

 

Get the 2 wire ones better for a earth

 

Errrrr, hang on.........senders tend ONLY to work with the gauges they were designed for.

Can you not buy senders which ae made by the gauge manufacturer?
Or look for "universal" senders, but don't expect accuracy........