Low fuel light on all the time
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Well the GN's never came with that as a option so either 2 things happend here. a) you pluged the wrong thing into the low fuel socket or b) you bought a low fuel light module and your car is not wired up for it or there is an issue with float. While some think the low fuel module is cool to have it does not work in all GN's because a lot of them were never wired for it. It was an option for the Riv's that have that same dash. Personally it's a useless option so pull it out and toss it and be done with it 
turbofish38
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Well the GN's never came with that as a option so either 2 things happend here. a) you pluged the wrong thing into the low fuel socket or b) you bought a low fuel light module and your car is not wired up for it or there is an issue with float. While some think the low fuel module is cool to have it does not work in all GN's because a lot of them were never wired for it. It was an option for the Riv's that have that same dash. Personally it's a useless option so pull it out and toss it and be done with it
Okay. We need to set the record straight as you seem to have an issue with these. Not being a smart a$$ just setting the record straight. First off the Regal and the Riviera share the exact same instrument clusters. The only difference is the fuel gauge because on the NA models it either says Riviera or Regal. That low fuel module twist into the socket and gets its reference through the printed circuit. The printed circuit is the SAME part for both models so you cant say the Regal isn't wired for it. It just wasn't an option.
First off does your fuel gauge work properly? If it does than I would check to make sure the copper hasn't seperated from the plastic on the printed circuit and causing a grounding issue. Double check it at the big gang connector too. If you are satisfied that everything is okay there than one can assume its a bad module. I've never seen a module that stays lit all the time which is why I say check the printed circuit. Usually they wont light if the module is bad.
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Eric there is no record to set straight. Try doing a search on this board (and the others) on this and you'll find MANY people who "just hooked up" that useless module and it did NOT work at all in the car. How do you explain that. It was not an option and was not meant to be in the GN's. I'm sure it could have even been because of the special fuel tanks the GN's used. Who knows but it was not an option for a reason. Even still untill you can show me 100 out of 100 cars that module works in then I'll beileve that record you seem to think is straight. 
Like I said.. that module is useless, a waste of time, and money to even bother with. No one should ever run their tank that low for it to even come on. The only thing that belongs in that hole is the low fuel led for the Razor's alky system!
Like I said.. that module is useless, a waste of time, and money to even bother with. No one should ever run their tank that low for it to even come on. The only thing that belongs in that hole is the low fuel led for the Razor's alky system!
Like I said.. that module is useless, a waste of time, and money to even bother with. No one should ever run their tank that low for it to even come on. The only thing that belongs in that hole is the low fuel led for the Razor's alky system!
Couldn't have said it better.
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Eric must have a huge supply of those things just waiting to sell them! 
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i read this whole post different
you all seem to be on the low feul light module
i saw no mention that there even was a low fuel module installed in this car
i read bulbs were replaced and now there is a steady lamp behind the filter that reads low fuel
never once did anyone consider that he may have mistakenly screwed a bulb into the back of the gauge cluster behind the filter where there was none and should be none
and my look on the riv to regal low fuel module , there is no reason for there to be any difference in operation if installed in a regal vs a riv , if it worked in the riv it will work in the regal assuming the regal worked properly before the module install
nothing mystical about our turbo tanks we are talking about the sender , a 90ohm sender is a 90 ohm sender ,
you all seem to be on the low feul light module
i saw no mention that there even was a low fuel module installed in this car
i read bulbs were replaced and now there is a steady lamp behind the filter that reads low fuel
never once did anyone consider that he may have mistakenly screwed a bulb into the back of the gauge cluster behind the filter where there was none and should be none
and my look on the riv to regal low fuel module , there is no reason for there to be any difference in operation if installed in a regal vs a riv , if it worked in the riv it will work in the regal assuming the regal worked properly before the module install
nothing mystical about our turbo tanks we are talking about the sender , a 90ohm sender is a 90 ohm sender ,
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Let me break it all down for you Pauly.. First you did not read the entire thread... as you will see in post #2 by me you'll see where I suggested to him that he might have plugged the wrong thing into the low fuel socket.
Also do a search on low fuel on this or any board. You'll find a nice long post of many many guys who hooked this up on their turbo Buicks and it didn't work. One guy even tryed the module on 4 turbo Buicks he owned and it only worked in one of them! Try that search bar next time!
Go back to sleep or get to work on Hoopers car and remind me to bring that damn cell phone to the meet next week!!
I had bought one of those worthless modules, cost me 25 bucks, don't know what I was thinking, I never let the tank get that low anyways. I may as well have flushed the money. the thing NEVER worked, and yes, my fuel level gauge works and has always worked fine. Rather than trying to get some of my money back by scamming someone into buying it, I gave it away, specifically telling the guy it may not work in his car.
Oh, and I do have some electrical engineering background, there was NOTHING wrong with the module itself.
Oh, and I do have some electrical engineering background, there was NOTHING wrong with the module itself.
turbofish38
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Yes the record needs to be set straight. I figured out what your problem is along with everybody else who couldn't figure the low fuel module out. You just dont understand how it works, along with the factory installed stay down gas doors.
Please provide links to those threads where they dont work on the analog gauges. I couldn't find any. Every Regal is wired for it. It was always an option on the high end Buicks like Riviera and Park Ave. I guess Buick didn't think that the TR was on the high end of the luxury spectrum. Follow along as I even went to the trouble of pulling the cluster out of one of the Rivs because I dont own an analog Regal. Pic 1. This is a cluster from a turbo Buick. Notice the boost-a-tach.
Pic 2. This is the back side. Notice the LFM in the lower corner.
Pic 3. This is the part number for the printed circuit. Look it up in the 44W parts catalog. Yes it fits both Regal and Riviera.
Pic 4. This is the Low Fuel Module. Notice one corner of the board is cut off.This is important for it to work.
Pic 5.This is the socket hole for the LFM. Notice it gets its signal from the fuel gauge circuit.It works on the resistence of the fuel gauge sending unit in the fuel tank.
Pic 6. The LFM installed in the socket hole. Notice the posistion of the cut off corner. The LFM can only go on one way and work. You can install it 180 degrees off and it wont work.
I have noticed that the more you use the LFM feature on your car the faster it reacts to the changing resistence of the sending unit. Usually it takes about 20 seconds for this gadget to sense the movement of the resistor on the sending unit. When I test these out on the same speedo cluster in the pics it is not uncommon to wait up the 3 or 4 minutes for it to light. After that they work pretty fast like I said.
This reply wasn't neccessarily made to mock fun at anybody in particular but more or less a reference for future use.
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turbofish38
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Great (and timely) thread. Thanks Eric. I just bought a low fuel module from a board member. I removed the four screws holding the analog dash into my 87 TR. The dash doesn't want to come out. Is it being held in by the speedometer cable? I didn't want to force it and risk breaking anything. If it is the cable, how should I disconnect it? Thanks!
Ok, disregard my last post. I was able to pull the speedometer out far enough to slip the low fuel module in, and I turned it to lock in place. The "cut off corner" is in the same spot as in the picture. However, when I turned the key to on, the bulb didn't come on. Is it supposed to?
I don't believe it will. Had one many years ago. Not the same circuit theory as the "idiot" lights
toofastforyou
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I've had one of those Low Fuel Modules on my GN for almost 20 years and it always did work ok...and still does...
Claude
Claude
I've had one of those Low Fuel Modules on my GN for almost 20 years and it always did work ok...and still does...
Claude
Claude- could you go out to your car and turn the key on and see if the low fuel module lights up? Would be greatly appreciated! :tongue:
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