7 replies to this topic

[RacingGreen]

I've been looking at different types of fuel gauges for when i fit a new dashboard.

The gauge need 16ohms to read empty and 158ohms to read full. I wanted to know is there anyway i can give the gauge the correct ohm ratings so it will read correcty?

Thanks
Mike

[fikus01]

a smiths one should read the same way!! not sure about a tim gauge!!

[RacingGreen]

a smiths one should read the same way!! not sure about a tim gauge!!

The smiths should read the same a the original gauge?

What i really wanted to know though,is how to make up the correct ohms incase the gauge i use doesnt read correctly?

Thanks
Mike

[Jimmyarm]

You have to get the matching sender unit for it, you could probably create some sort of circuit to alter what resistance the original sender puts out across the range but I havent got the foggiest how you would set it up !

[miniboo]

you can use resistors or a potentiometer(variable resistor)

[dklawson]

Er... no.

I suppose the very late Mini sending units may be different, but.... All the post 1964 sending units I've seen operate between a nominal 240 ohms empty to 30 ohms full. You can narrow that range by adding parallel resistors... but you can't change the direction. (240-30 vs 16-158)

If it's not too late, go back and select a different, matching gauge that accepts the input range of the Mini sending unit. If you have a volt/ohm meter check your sending unit directly. Mark and disconnect the wires on the side of the tank. Connect the volt/ohm meter and set it to measure resistance. Use a flashlight to look in the tank through the filler neck and use a bent coat hanger to lift the float arm to the top while watching the meter. Repeat this by pushing the float all the way down. Buy a gauge that comes closest to the range you just measured.

[RacingGreen]

thanks DK, i havent bought the gauge yet, so i will find one which suits the sender, i just wondered how i would go about getting it to read correctly.

Thanks
Mike

[fikus01]

just wondered how i would go about getting it to read correctly.

its a mini get a torch and have a look in the tank anything else is an electronically calculated guess!!!!