fuel gauge

[legitimate_datto_scientist]

ive got a 77 210

 

gas gadge stopped working, every other gadge works fine.

 

before i buy anything, what is list of things that could have gone wrong? and how can i check them?

[Tristin]

Fuel gauge my not be the problem... as it could be a few other things. You should ground out the gauge and see if the needle moves. It could be the fuel sender unit in the tank thats gone out.

[legitimate_datto_scientist]

the needle being stuck is very unlikely because i never had an issue with it until it suddenly flat lined. but i'll check it

[Tristin]

Im saying that if you ground it out and it goes from showing "Empty" and moves all the way to "Full" then its probably not the gauge.

[datzenmike]

There are two wires entering the tank. Check that either hasn't corroded and fallen off. The yellow wire goes through the sender and out the black wire to ground. Grounding the yellow wire should send the gauge to the FULL mark.

 

If it does, it's possible the black wire has come loose and isn't grounding so try a good ground to the black wire to test it. If still not working then the sender inside the tank is suspect.

 

If it does not read FULL there is a problem between the tank and the gauge. Check the connector at the tank for corrosion.. it may not be making good contact. Under the pass side seat is a 10 pin connector where the cab and the frame harness meets. Unplug and plug several times to clean the connections.

[legitimate_datto_scientist]

thanks. the yellow wire had somehow.

[datzenmike]

thanks. the yellow wire had somehow.

 

......................................... wat????

[sam]

how do you ground the gauge to see if it reads to full ?

[datzenmike]

There are two wires entering the tank. Check that either hasn't corroded and fallen off. The yellow wire goes through the sender and out the black wire to ground. Grounding the yellow wire should send the gauge to the FULL mark.

 

 

Uh I see it's actually two black wires to the tank sender on the B-210 so unplug at the tank and run a grounded jumper wire to either of the black wires going back to the gauge end one should cause a FULL reading with the key on.

[legitimate_datto_scientist]

......................................... wat????

 

sorry, yeah the yellow was disconnected. you were right the first time; yellow and black. i feel like a boob for not noticing it myself, but thanks again

[datzenmike]

Pass it along to the next guy....