fuel sender ohms

[Rotti]

Just organising a new VDO fuel sender.....on a gauge site it recommends GM 1965 - present day, is 0-90ohms? Does anyone back this up or is it 10 -180ohms? thanks guys & girls...

[Rotti]

Practically re-wiring, so can I buy a 10-180ohm combo, gauge & sender? or do I have to stay 0-90ohms?

[Sammy]

isn't the sender normally part of the float level mechanism in the tank (sorry not familiar with bedford ones) if you can replace the sender then its easy, otherwise your going to need to get a gauge to suit the range of the sender

[BeerBeddy]

You can always add a resistor of some value to change it to suit. I didn't quite understand what you want so I'll will add what I think will answer most possibilities.

If you have 0 to 90 ohms but want 10 to 180 ohms, add another resistor of 90 ohms (or thereabouts) in series with the tank resistor and that will give you a reading that should be pretty close.

If you have 10 to 180 ohms but want 0 to 90 ohms, add another resistance of 180 ohms (or thereabouts) in parallel with the tank resistor which will bring down to around 90 ohms. You can get suitable resistors from electronics stores like Jaycar.

I have some vintage cars that were 6V systems and I had to do similar mods to a few things when I converted them to 12V.

Hope that helps somewhat.

Beerbeddy

[BusyKiwi]

The best way is to stay the same sender and gauge, as the ranges can be anything from 3 - 180 (full to empty) to 120 - 8 (full to empty)

A resistor will only work if within the same range, otherwise you'll only get one (full or empty) right and the other will be way off

There are some programmable aftermarket fuel gauges out there but most are buscam (oem stuff)

[Rotti]

Thanks for the feedback guys, put the ohm meter on the sender today, must be 0-90. 'Technical' wiring is a little over my head sometimes, can usually figure most things out...eventually! nice to get some help
So, seeing that I am re wiring the dash, no original gauges etc, I still haveto stay with 0-90? The reason I ask is that I can purchase a gauge / fuel float/sender combo that is 10-180....

[BusyKiwi]

I'm in the same boat, am wiring my custom van up at the moment, i had a tank made up and it has a VDO sender in it but even VDO come in different ranges.

Ideally if you can use an aftermarket gauge and sender unit to suit you'll have less problems down the line.
I'm going a digital programmable gauge only because I can't find an electronic speedo in the same series of gauges I want

Oh and I think bedford is backwards, example 0-90 would be 0 = full, 90 = empty but the standard after market gauge of say 0-80 would be 80= full, 0 = empty

[BeerBeddy]

Oh and I think bedford is backwards, example 0-90 would be 0 = full, 90 = empty but the standard after market gauge of say 0-80 would be 80= full, 0 = empty

"Dat's no trooble (he says using his best Irish accent) joost turn da sender unit oopside down, dat weel fix et!"

Beerbeddy

[Sweet Shock]

I put my multimeter on the fuel wire from the dash (green/black trace) and earthed it and got 1324 ohms.I think I got about ½ a tank of fuel in it. I had my sender repaired a couple years ago and all is good but I want to change my fuel gauge. 1324 seems high Does anyone understand this reading.
Thanx Pete

[Dano]

good post ....i need to sort my fuel gauge....pain in da rear .with no gauge...cheers