19-10-2021, 08:27 AM
(This post was last modified: 19-10-2021, 08:28 AM by John Cornforth.)
Hi Tiger
The sender body earths via its multiple screws to the tank, which in turn earths to the engine block via the copper petrol pipe. The tank was originally mounted with rubber "dogbone" washers, so may or may not also earth to the body/chassis at its fixings. The black wire on the unit side may be a supplementary earth to the body/chassis that someone has added in the past.
The sender resistance ranges from 2 or 3 ohms minimum to 25 to 30 ohms maximum. Depending on which variant you have, maximum resistance may equate to a full tank or an empty tank. The gauge therefore has to match the sender.
The sender body earths via its multiple screws to the tank, which in turn earths to the engine block via the copper petrol pipe. The tank was originally mounted with rubber "dogbone" washers, so may or may not also earth to the body/chassis at its fixings. The black wire on the unit side may be a supplementary earth to the body/chassis that someone has added in the past.
The sender resistance ranges from 2 or 3 ohms minimum to 25 to 30 ohms maximum. Depending on which variant you have, maximum resistance may equate to a full tank or an empty tank. The gauge therefore has to match the sender.