Deleted
Deleted Member
Posts: 0
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Post by Deleted on Dec 20, 2010 18:32:47 GMT -5
Just to clarify....
Pull the single wire off the top of the sending unit....and ground it to the car body/frame.. (with key in run position) I would use a jumper wire.
If your gauge pegs out, your gauge and wiring is good....which means your problem is the sending unit.
If the gauge does not respond, your issue is in the wiring/gauge.
This is about as simple as any automotive electrical diagnosis can possibly be.
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Cody
New Member
'71 Charger R/T 440 4-speed
Posts: 13
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Post by Cody on Dec 20, 2010 21:59:59 GMT -5
You're right Tom, its a very simple diagnosis and I've tracked my car's problem down to a broken ground between the sending unit and the chassis. I know the simple fix is to hose clamp a wire to the sending unit vent and secure the other end to the frame, but my question is how was the 71 charger fuel sending unit grounded from the factory? As far as I remember, my car has never had a grounding wire and the fuel gauge has only recently stopped working. I assumed the sending unit was grounded through the connection made between the sending unit locking ring and the tabs on the fuel tank, but maybe that is no longer good enough. Am I missing something? Was there a factory grounding wire that has disappeared from my fuel system?
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Post by odzking on Dec 20, 2010 22:33:59 GMT -5
Correct me if I'm wrong but isn't there a rubber gasket between the sender and the fuel tank to seal the opening? This gasket also has the effect of insulating the sender (electrically) from the tank/chassis. Hence the need for the ground strap... Yes, but as mentioned ... the locking ring. You'd think that would do it ... but it doesn't. Usually (factory) as I said there is a strap. It probably fell off. It is only soldered on. |
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Post by Nacho-RT74 on Dec 20, 2010 23:22:28 GMT -5
not even soldered, just tighten with plyers
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Post by charger440sixpac on Dec 21, 2010 10:51:08 GMT -5
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Post by odzking on Dec 21, 2010 11:28:18 GMT -5
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Post by MrSnicks on May 21, 2011 10:33:10 GMT -5
I bought the first one and it wasn't long enough. Had to get the second one to fit.
Patrick
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Post by MrSnicks on Mar 11, 2013 8:48:55 GMT -5
Wow. Has it been this long ago that I installed the new tank/sending unit in the wife's car? Well the gauge no longer falls below the FULL reading. Based on the previous posts the sending unit is not working correctly? Can the sending units be adjusted/fixed?
Patrick
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Post by Nacho-RT74 on Mar 11, 2013 12:48:31 GMT -5
repro senders are not perfect made like originals.
they can be made to work nice though.
the one I got in $50 way back ago and didn't work propperlly... sometimes lost the reading... gave a kick to the tank, and reading got back.
removed, opened, give some tension to the point spring and everything nice from that
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purplecharger
Been Here A While
collecting parts for the next one
Posts: 768
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Post by purplecharger on Mar 11, 2013 15:22:35 GMT -5
If you have to kick the tank to get it working, it means the ground strap from the tank to the gas line is not making a good connection.
second, along the gas line there is a metal strap that is driven in-between the body panels and attaches to the gas line to make a ground
Check for this your problems will go away
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