i have a 92 gsr. i replace the guage bulbs and climate control with led bulbs. now my gas light stays on all the time. i had a abs problem and the abs light was on so i took out the bulb. does anyone know if the two are related.
What brand of LED bulb?
The low fuel light is supplied a ground by a thermistor, a thermistor is never all the way “off” and an LED, that needs very little current would be on with even the little bit of ground supplied by the thermistor, unless the LED has a “load” built into it to deal with that ground, just guessing. 
94
I pulled my ABS bulb and didn’t have the always-on fuel light, so that shouldn’t be your problem. My guess is the LED bulb you’re using for the fuel light isn’t getting along with something…put the OEM bulb back in and see if that changes anything.
Most, if not all people that convert their dash to LED leave the warning/notification lights OEM…