Hey guys..

I just changed the gauge face from stock to white background w/ red numbers.

Anyway, I marked the locations of the needles so I could put them back right. They all seem to work fine, except today, my "Low Fuel Light" didn't go on when the needle got 'just' into the last 'bar.' like usual.

I'm pretty sure the Low Fuel Light isn't controlled by the position of the gauge, but the gauge runs pretty low and I'm kinda afraid that I will run out of gas without the light coming on.

Can someone please reassure me that the light comes in when the tank is low, and NOT when the needle gets low??

Thanks

 

I think the light is controlled by the PCM signal from the tank pressure and the guage by the mechanical part of the sending unit on the fuel pump. Some of the other guys can offer more details or correct me if I'm wrong.

 

The sending unit in the tank sends the signal to the instrument cluster. The needle and the light are controlled by a micro processor in the instrument cluster. Where you may have installed the needle will not affect the signal. You could actually pin the needle ¼ turn too high and your light would come on at the ¼ tank mark.

JMC

 

I've disassembled several instrument clusters, and IDK how you could effectively mark the needle positions. The correct way to restab them is:
1) turn the key on (engine cold) & note the needles' positions
2) key off, disassemble, reassemble, key ON
3) stab the needles back to their previous positions

If you stab the needles with the key OFF, you have no idea where the gauge shaft is turned to. You have to power them up so they go back to the same positions.