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Author Topic: Fuel Tank : earth n wiring issues  (Read 5944 times)

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Offline Marky

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Fuel Tank : earth n wiring issues
« on: October 25, 2016, 08:00:14 AM »
Hi all
I removed my fuel tank and had it cleaned n sealed by a radiator mob

Can't get fuel guage working again
Dash is out and I'm  working from the wiring cluster but got no signal at dash

On the wiring diagrams on tanks.. In Beddy books lists a fuel tank earth
But on my tank n sender no earth lead .. Just a round plug

Have a few tanks early models w earth
Any ideas ?
« Last Edit: October 25, 2016, 08:07:28 AM by Marky »
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Offline Marky

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Re: Fuel Tank : earth n wiring issues
« Reply #1 on: October 25, 2016, 08:12:29 AM »
The sender I have..
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Offline Marishka

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Re: Fuel Tank : earth n wiring issues
« Reply #2 on: October 25, 2016, 08:42:03 AM »
G/day Marky.
You might find you need a good earth from the outside of your tank to the body.
Otherwise its trying to earth through the tank straps and its not good enough.
Try an aligator clamp on the tank flange to body to see if it works?
If it does you could drill a tiny hole on the outside of the tank flange ( outside the seam ) and use a selftap screw to secure a wire.

Offline Marky

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Re: Fuel Tank : earth n wiring issues
« Reply #3 on: October 25, 2016, 11:03:55 AM »
From what I can work out..12v goes to gauge .... then earth from gauge  to negative on float.. But not sure
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Offline rumax

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Re: Fuel Tank : earth n wiring issues
« Reply #4 on: October 25, 2016, 06:02:30 PM »
Remember this fancy electricity stuff needs a full circuit.

but I'm going left field here....check the fuse!

and yes the 12 v will be at the gauge... cos the other end is a variable resistance thingy (called a sender unit....lol)
Workin for the weekend!

Offline Marishka

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Re: Fuel Tank : earth n wiring issues
« Reply #5 on: October 25, 2016, 09:50:58 PM »
Correct but you will still need to earth the tank to complete the curcuit.

Offline shaginwagin

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Re: Fuel Tank : earth n wiring issues
« Reply #6 on: October 26, 2016, 07:31:27 PM »
   I put an earth wire, from one of the  screws that hold the sender unit into the tank to the body.  Also put another earth wire  into the seam on the fuel tank to the body.  There is room in the seam but keep it as close to the outside edge as possible, just need enough room to hold the wire.  Make sure you scrape off ant paint dirt or rust to get a good earth.   Hope it helps.
Nothing is impossible it just takes a bit longer
Julian

Offline Marky

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Re: Fuel Tank : earth n wiring issues
« Reply #7 on: October 26, 2016, 08:19:46 PM »
Thanks all .. Will get myself earthed n report back to the Buga oracle..
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