Fuel Gauge

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Langlia
Posts: 594
Joined: Mon Dec 14, 2015 11:04 pm
Location: Langley BC

Fuel Gauge

Post by Langlia »

Hi guys,

Tried hooked up my fuel gauge today to my 105E

If I put 12v to the back of the gauge it goes all the way up to full when I have the gauge grounded.

With sending wire in place of ground it sits at Empty.

I know it's not full though, new sending wire from float to dash.

Does the float need to be grounded to the body?
Does the tank need to be grounded?
If the tank is grounded is it causing the wire to short?

Thanks for any help.
If I have power and the
peteleo
Posts: 1332
Joined: Sun Aug 24, 2008 11:57 am
Location: San Mateo,California

Post by peteleo »

12V on one side of the fuel gauge and other side, wire to a wire wound variable resistor ( sender unit ). Resistance range ~ 12-22 ohms ( full ) to
~240-290 ohms ( empty ). Sender unit should be grounded - lugged wire mounted from a sender unit screw to body.
Langlia
Posts: 594
Joined: Mon Dec 14, 2015 11:04 pm
Location: Langley BC

Post by Langlia »

Fantastic.

Thank you!
Brett Wilkie
Posts: 1825
Joined: Sun Sep 16, 2012 12:42 pm
Location: Vancouver British Columbia Canada

Post by Brett Wilkie »

I can't remember, does the 105e have a instrument voltage stabilizer like the Cortina had???
Anglia 100e modified
Prefect 100e stock
peteleo
Posts: 1332
Joined: Sun Aug 24, 2008 11:57 am
Location: San Mateo,California

Post by peteleo »

Good point, Brett. 10 V voltage stabilizer on the instrument panel for the fuel and temp gauge. So, actually ~10 V on one side of the fuel gauge terminal
instead of 12 V. Either way the gauge operated when touching the wire to the sender unit was grounded.
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