New fuel gauge wiring Help needed

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Tomaboyd
United States of America
Posts: 17
Joined: Tue Dec 10, 2019 6:52 pm

New fuel gauge wiring Help needed

Post by Tomaboyd » Sun Jun 28, 2020 2:13 pm

Bought a new 24v fuel gauge from one of the Pinzgauer parts guys in Austria. Got a new sending unit (24V) from SAV. Have about 1/2 tank of fuel.

Hook it up and get a constant full tank reading.

My new fuel gauge has four connections. +, G, down arrow and then the bulb. I am connecting power (black) to the +, and a new ground wire from the sending unit to the G and the brown lamp wires to the bulb.

Any idea what I am supposed to connect to the down arrow connector?
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pcolette
United States of America
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Joined: Sun Dec 10, 2006 7:38 pm
Location: Southwest Wisconsin

Re: New fuel gauge wiring Help needed

Post by pcolette » Sun Jun 28, 2020 5:21 pm

I believe the G terminal on the gauge should go to the ground terminal on the sender ( the terminal you are not currently using) and then also to a good clean ground on the Pinz.
The down arrow terminal on the gauge should go to the sender terminal with the nut that you now have connected to ground.
Paul C.
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'89 Puch 230GE
2002 MB G500

63rover
Canada
Posts: 238
Joined: Thu Oct 10, 2013 8:18 pm
Location: Mt. Hope, Ont., Canada

Re: New fuel gauge wiring Help needed

Post by 63rover » Mon Aug 31, 2020 8:02 am

G is the sender unit connection.
+ is power
the lamp goes to its connection

the last connection is for ground

The fuel gauge works by measuring the difference between the resistance to ground (the contact you need) and the resistance to ground through the sending unit's variable resistor which changes with the fuel level. Resistance near 0 ohms = full and greatest resistance, near 90 ohms = empty.

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