Author Topic: Low Fuel Light Wiring for Over Head Console  (Read 1694 times)

Offline ksierens

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Low Fuel Light Wiring for Over Head Console
« on: July 19, 2017 - 06:45:40 PM »
I am finishing the wiring in my dash before putting it back in the car. The harness from the low fuel relay to the gauge has the same type of connector as the one from the sender unit (push on).  The sender lead attaches to the left side (Dark Blue) and the voltage limiter to the right side (Black).  Looking at some wiring diagrams, it loos like both of the dark blue leads should be connected together.  Can anyone confirm this, and do you have any pictures of how the original harness is connected together for an overhead console?

Thanks in advance.

Kurt Sierens
1970 Triple Black Challenger R/T  440 Six Pack - 4 Speed - 3.55 Dana
Kurt - SE Michigan




Offline FY1Cuda

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Re: Low Fuel Light Wiring for Over Head Console
« Reply #1 on: July 19, 2017 - 07:40:32 PM »
Pretty sure that the blue wire from the overhead console low fuel light goes right past the instrument panel and connects to the low fuel relay behind the glove box.  Then another blue wire goes from the relay across the dash to the fuel gauge.  Do you have a wiring diagram from the original service manual?  I think it's in there.

Offline FY1Cuda

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Re: Low Fuel Light Wiring for Over Head Console
« Reply #2 on: July 19, 2017 - 07:54:20 PM »
Found the page.  The slightly thinner blue wire goes to  the relay. The thicker wire (G4A-18DBL) goes to one side of the fuel gauge.  The normal fuel gauge wire goes to the other side.

Offline ksierens

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Re: Low Fuel Light Wiring for Over Head Console
« Reply #3 on: July 19, 2017 - 08:16:09 PM »
Thanks, I just found that too. I was confused because another diagram I found on the web shows it as both dark blue wires go to the same side of the gauge, and the other side to the voltage limiter.

I hooked it up like the picture, the wire from the relay to the left side, and the wire from the sending unit on the right.

« Last Edit: July 19, 2017 - 08:17:58 PM by ksierens »
1970 Triple Black Challenger R/T  440 Six Pack - 4 Speed - 3.55 Dana
Kurt - SE Michigan

Offline 1 Wild R/T

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Re: Low Fuel Light Wiring for Over Head Console
« Reply #4 on: July 19, 2017 - 08:55:00 PM »
Exactly, the fuel gauge gets disconnected from the IVR & the low fuel relay supplies the voltage....
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Offline ksierens

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Re: Low Fuel Light Wiring for Over Head Console
« Reply #5 on: July 19, 2017 - 09:30:31 PM »
Ok, then I should unplug the wire from IVR (on the right) and plug the lead from the LFR in.
1970 Triple Black Challenger R/T  440 Six Pack - 4 Speed - 3.55 Dana
Kurt - SE Michigan

Offline 1 Wild R/T

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Re: Low Fuel Light Wiring for Over Head Console
« Reply #6 on: July 19, 2017 - 09:48:07 PM »
Yup..
JS27N0B 70 Challenger R/T Convertible  FJ5 Sublime, Show Poodle w/90,000 miles since resto
WS27L8G 68 Coronet R/T Convertible  PP1 Bright Red, Project
RM21H9E 69 Road Runner Coupe R4 Performance Red, Sold...
5H21C  65 Falcon 2 dr Wagon... Dog Hauler...

Offline ksierens

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Re: Low Fuel Light Wiring for Over Head Console
« Reply #7 on: July 19, 2017 - 10:18:12 PM »
Thanks!
1970 Triple Black Challenger R/T  440 Six Pack - 4 Speed - 3.55 Dana
Kurt - SE Michigan