83 Low Fuel Warning Light

[MidnightBlue83]

So I have replaced the switch behind the passenger dash bezel, replaced the instrument cluster voltage regulator and filled up the tank but my low fuel warning light in the console is still on! Is there a sensor or something somewhere else that could be the culprit? Any ideas?

 

[MidnightBlue83]

Still no luck with getting this light to turn off. I am so frustrated. I've been trying to get this warning light to work correctly for a year now. Am I missing something??!

 

[General karthief]

Stole this from fep, foxchasis wrote the post.
Low Fuel Warning Switch Circuit

Improper operation of the low fuel warning system will be apparent when the indicator lamp remains On continually with more than 1/4 tank of fuel or if the indicator lamp remains Off when the tank is empty. If either condition exists, be sure the wiring connector is fully engaged in the low fuel module. Be sure the fuel sender connector is connected to fuel sender. If this does not correct the problem, proceed with the following:

Disconnect the wiring connector attached to the low fuel warning switch. With the ignition On, test the terminal connector positions of the wiring harness connector as follows:

Position 1: Blank, no terminal.

Position 2: Connect a test lamp between terminal and ground. Test lamp should blink. If lamp does not blink, check the following:

• With ignition Off, continuity should exist between pin two and the fuel sender hat terminal. If this is open, check wiring.
• Fuel gauge inoperative: caused by open winding within fuel gauge.
• IVR inoperative: If this occurs, no gauges function.

Poistion3: With ignition On, connect test lamp between terminal and ground. Test lamp should blink and be brighter than position 2.

• If test lamp does not blink, check IVR.
• If test lamp works, but is not brighter than poistion 2, check wiring for open circuit between terminal two and hat side of the fuel sender connector.

Position 4: Connect test lamp between terminal and positive battery terminal. Test lamp should glow and remian On.

• If lamp does not come On, check for open circuit between pin four and ground.

Position 5: Connect test lamp between terminal and ground. Test lamp should glow and remain On.

• If lamp does not come On, check warning lamp fuse in fuse panel. If fuse is OK, check wiring between terminal five and warning lamp fuse.

Position 6: Connect jumper wire between terminal and battery positive terminal. Warning lamp should glow and remain On.

• If lamp does not come On. replace warning bulb.

If all of the above tests prove OK, replace the low fuel warning module.

Position 1: Blank
Position 2: To Sender - Light Blue
Position 3: IVR to Gauge - Black/Light Green Dots
Position 4: Ground - Black
Position 5: Ignition Switch - Red/Yellow Hash Marks
Position 6: Warning Lamp - Yellow/Black Dots

The low fuel warning module is located behind the right (passenger) dash panel, directly above the glove box opening.