Low fuel light stays on

[4WDUTY]

Hello-

Just picked up a nice 85 GT. Just recently, the low fuel light in the heads up instrument center is staying on. The actual gague works accurately. It was on at 1/4 tank, so I filled it and the light still stayed on.

Anyone else encounter this and if so, what should I look for?

Thanks in advance!!

[Puter]

*chuckle*
Well, yeah, I have. I bought my 84 over 15 years ago. Mine started doing the same several years ago. I haven't really worried that much about it. My fuel gauge still works fine.

If ya find the answer, post it here please.

[RACECAP97]

Same thing in my pace car. The light in the console stays on no matter how much gas is in it. I haven't tried screwing around with it yet but my guage seems to be pretty accurate.

[frdfandc]

How about pulling the bulb????

[Puter]

How about pulling the bulb????

Well, it's not that I want the light to go out. It doesn't bother me. It's that I would like to repair it so that it again comes on when the tank is near 1/4.

[FoxChassis]

It's not a bulb, it's an LED, and it's part of the "graphic display warning system".

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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.

[RACECAP97]

Really good info, where did you get it? 8O

[FoxChassis]

Certainly not from Chilton, Haynes, Clymer, or Mitchell shop manuals. :lol:

That information was copied directly from OFFICIAL Ford shop manuals.

[frdfandc]

Personnally I've never needed a light to tell me when I need gas. How about putting a piece of electrical tape over it? I'd be doing anything to get rid of the light. I wish I could get rid of the low fuel light on my 03 Silverado.

[goose]

I think it's an attention-to-detail curse: if something is equipped, we want it to work. For example, my low windshield washer fluid light on the display doesn't work. It annoys me - in the back of my head I know it's not working. I figure some day I want to fix it. I figure either the sensor curcuit is broken, or merely disconnected, or the sensor is bad.

Don't ask about the clock. :) Mine jumps time zones or something. I think I'll get a nice analog clock to fit there, guage-style. Until I need switches for something. Other guages would go on the A-pillar.

[frdfandc]

I guess my priorities are different since mine is a track only car. lol. The less weight the better.

[goose]

I guess my priorities are different since mine is a track only car. lol. The less weight the better.

I'm going to pull my AC compressor out, so that should make up for all the useless crap. ;)

[frdfandc]

I basically have nothing on the car as far as luxury items go.

Roll up windows
Manual Locks
A/C removed (soon to have heater box removed)
Manual rack & pinion

[twister]

don't feel bad, mine only works right out of the state of california

[wristpin99]

a new ignition switch will fix that. eventually you will wind up having to change it anyway, so drop ten bucks plus the price of the tool ytou'll need to get it out and you're done. also there is a voltage regulator for the dash panel. haven't done mine yet but i'm gonna get to it when i start work on the engine and interior resto.

[FoxChassis]

a new ignition switch will fix that.
A new ignition switch will fix what?

[mfpmax]

Easy way to solve your problem...

Give me your console.