s14 fuel guage not working... HELP

[Jake1992]

so first of all im new to the forums..
bought my car like 6 weeks ago but really
haven't had much time for researching online.

My cars fuel guage is below empty... because the
previous owner told me he had taken out the stock
fuel level float because it was cracked and broken. (he dumped it in the trash),because of my location on the island its pretty limited.
I got one of a 2000 s15 and put it in the tank. had 2 plugs (same size)
one had 2 wires and one had 3 which clicked in the tank itself,
correct me if im wrong. ( it did not come with the big plug that goes in the
fuel sending unit)

would a fuel level float from a 98 gts fit in mine ? and is the wiring the same?
can anyone indentify the plugs please !

thanks guys

[Yellow4g63]

Wish I could help you mine is broke too. I had a cracked tank and to change my tank. The tank I bought the guy had cut the freaking plug out of it??!?!?!?!?!?!? why would he do this??? So when the shop installed my tank they had reconnect the wires but it still don't work.

[Jake1992]

Wish I could help you mine is broke too. I had a cracked tank and to change my tank. The tank I bought the guy had cut the freaking plug out of it??!?!?!?!?!?!? why would he do this??? So when the shop installed my tank they had reconnect the wires but it still don't work.

sux right ?

i bought mine like this.. there are wires in the tank and one on top that connects to the fuel sender unit right ?

[Promise Land]

The best way to fix this is get the service manual or wiring diagram from each car you have parts for. You just need to figure out which wires go together from the sender to the car's wiring.

The previous owner to my car put an OBD-II fuel tank into my OBD-I car. I had to get the manuals for both and dissect the wiring diagram to make the gauge read correctly. The fuel level is correct, but I can't ever get the fuel light to come on. But I have yet to run out of fuel.

[Jake1992]

The best way to fix this is get the service manual or wiring diagram from each car you have parts for. You just need to figure out which wires go together from the sender to the car's wiring.

The previous owner to my car put an OBD-II fuel tank into my OBD-I car. I had to get the manuals for both and dissect the wiring diagram to make the gauge read correctly. The fuel level is correct, but I can't ever get the fuel light to come on. But I have yet to run out of fuel.

Where did you get those ? i have the one for my car i beleive but couldnt really get that far. Do you have like a silver colored small stick like a socket hanging at the side ? suppose that is what turns the light on ... I wired mine maybe wrong and have a gas light that is on 24/7:facepalm: SO , taken ur advice i might just go open up mine again.... do you remeber if it reads from the plug inside ur tank or the one on top ?? ...

thanks

[Yellow4g63]

sux right ?

i bought mine like this.. there are wires in the tank and one on top that connects to the fuel sender unit right ?

yup when I get the time I'll put a volt meter to them and figure out whats going on.

[Promise Land]

Where did you get those ?

I looked through the Factory Service Manuals and looked in the fuel sender section to determine if it's bad. There it shows you the pin-out of the connectors and I used simple deduction to figure which was which based on the diagram.

[Jake1992]

I looked through the Factory Service Manuals and looked in the fuel sender section to determine if it's bad. There it shows you the pin-out of the connectors and I used simple deduction to figure which was which based on the diagram.

Thanks mate...

Its about the time that im really pissed right now ... i tested everything and im thinking my gauge is gone bad. do you have 3 or 2 wires from float to car ?

[Jake1992]

Wish I could help you mine is broke too. I had a cracked tank and to change my tank. The tank I bought the guy had cut the freaking plug out of it??!?!?!?!?!?!? why would he do this??? So when the shop installed my tank they had reconnect the wires but it still don't work.

Where does your tank connect back to the car (electronically ) ?? is it a plug ??? thanks ...

[Promise Land]

do you have 3 or 2 wires from float to car ?

OBD-1 has 3 wires. Positive, Negative, and low-level light. OBD-II had 4. Same 3 and didn't need to worry about the 4th. Don't remember what the 4th is for.

[Jake1992]

OBD-1 has 3 wires. Positive, Negative, and low-level light. OBD-II had 4. Same 3 and didn't need to worry about the 4th. Don't remember what the 4th is for.

damn it ... im gunna go out and check my guage now...

My car is 94 with a 95 harness in it. In my tank i have 3 wires , and so i do at the top of my tank... do you know where the cables connect from tank to the cars harness.?

[Jake1992]

Hey Guys ...

I came home early from work ... read ur reply's ... I GOT IT TO WORK :squintd:

hahah sorry im happy man....
it sux not having fuel and ur car just stumbles and turns off infront of
your grandma's house..

so.. like Promise Land said: 3 wire plug which i had to use 1 and 3 and connect the float to it.. but i had one from an s15 so i ended up splicing a couple of wires putting it on multimeter and with my service manual got it to work... guage was revived after grounding its screw for less then 10seconds.

The only question i still have is ... there is a plug laying around in my tank and a plug that is on the float clicks right in it ( when i was pissed i cut it :yum: ) is that the gas light or something else ? cuz to my understanding the middlewire is the gas light ... i dint close up tank yet so lemme know

[Promise Land]

The only question i still have is ... there is a plug laying around in my tank and a plug that is on the float clicks right in it ( when i was pissed i cut it :yum: ) is that the gas light or something else ? cuz to my understanding the middlewire is the gas light ... i dint close up tank yet so lemme know

Awesome that it works! Congrats...

I followed the manual also and the middle wire is the fuel light. But, don't be discouraged if it doesn't work. I have never been able to get my light to come on and I've driven until the needle is on the 'E' line and there's 360 miles on the tank. I have just decided to drive until I get the E line and not drive it until I get the light or it runs out of gas. I don't want to tow it home any more times than I have to...

[Jake1992]

Awesome that it works! Congrats...

I followed the manual also and the middle wire is the fuel light. But, don't be discouraged if it doesn't work. I have never been able to get my light to come on and I've driven until the needle is on the 'E' line and there's 360 miles on the tank. I have just decided to drive until I get the E line and not drive it until I get the light or it runs out of gas. I don't want to tow it home any more times than I have to...

thanks man , it was really working on my nerves and got it fixed... i had to go get gas once and come back and fill my car... hope this helps more people ...

[SinCityS14]

My gauge reads full, but after driving around knowing that im low on fuel it will eventually come down (after 200 miles of it reading full) so i guess my gauge is not reading accurate?!? right?? anyone had this problem?

[SinCityS14]

^^^ so would that be the sending unit or the float? or what can it be i havent taken anything apart just yet.

[essthirteeeen42]

My fuel gauge doesn't well as well, will try reading the FSM

[BoostWanted]

Lol nice bump.