My gas light never came on in my red car but in my black 90 is it is coming on at strange times. I just started driving it and at first the light came on right when it hit red but the next time it came on right past half tank. I have never had this light so i dont know what is going on. What is going on?
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Is the fuel gauge accurate?
There is a set of contacts that close in the fuel sending unit when the tank reaches 1.5 gallons, this provides a ground for the low fuel light.
So maybe the contacts are closing for some strange reason at the wrong time, or you have an intermittent short to ground in the brown/grey wire, between the sender and the cluster.
This is where I would start, but maybe there is a common problem i'm not aware of.
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there is a contact point in the sender that is supposed to close, turning the low fuel light on. i have no idea why yours is all over the place
i bought a new VDO sender this year and have never seen the low light. it used to work great w/ the older sender. wtf? recently i hooked my old sender back up and the light wasn't working until i shook it around pretty violently. i'm pretty pissed about this, but can live w/ no low fuel light.James
'88 M3
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