gas gauge

[Skib]

Gas gauge on the goon is out, Iv pulled the regulator deal off the back and cleaned it all up and the two wires that go to the sender in the back on top of the tank.

 

 

any other suggestions?

[fo0manchu]

was it working before?

[metalmonkey47]

Is the unit in the tank coroded? Try pulling it and testing for resistance to see if it's functioning.

[djaztek12]

welcome to the club :lol:

[MicroMachinery]

Try grounding the wire going to the sending unit. The sending unit acts as a variable resistor, and based upon the resistance provided, it gives you a different reading on the gauge. If you ground the wire from the gauge, then it should sweep to "FULL". If you get no movement in the gauge when you ground it, then something's going on with the gauge. If it moves, then you know to start investigating in the wiring to/or the sending unit.

[Skib]

was it working before?

 

 

ya

[yellowdatsun]

Grounding the sender works wonders. Give you an excuse to pull the sender out anyways and have a peek at it.

[datzenmike]

Skib if the temp is working then it's not the voltage regulator in the dash cluster. Grounding the yellow wire at the tank sender should cause a FULL reading on the gauge if it is working correctly. Because there is a single wire to the tank the tank must be well grounded for a good return.

 

If all the above passes then it must be the internal sender. The sender wires are hair thin.

[djaztek12]

Skib if the temp is working then it's not the voltage regulator in the dash cluster. Grounding the yellow wire at the tank sender should cause a FULL reading on the gauge if it is working correctly. Because there is a single wire to the tank the tank must be well grounded for a good return.

 

If all the above passes then it must be the internal sender. The sender wires are hair thin.

 

my goon dose the same thing, i have an after market gage when i hook up the yellow wired to the gage it marks full, then when i hook up the black wire from the sending unit to gage it goes all the way passing the empty reading. would that be that my gage is no good. :huh:

[datzenmike]

Not familiar with the gauge you are using. Usually the Nissan sender is 10 ohms (FULL) and 80 ohms (EMPTY) resistance. Try reversing your wires or check the specs on the gauge you have.

[yellowdatsun]

Datzenmike has a good point, and I've used it to test many gauges. Works the same for the temp gauge. Ground the gas tank sending unit to the chassis, and the gauge should read full. If it doesn't, the gauge/wiring is bad. If it does read full, the sender is bad. Easy way to eliminate problems.

[fo0manchu]

skib your screwed, might as well give up and send the wagon my way... hahaha :lol:

[jesusno2]

dont feel bad skib i have a brand new nos sender and my guage still dont work :angry:

[djaztek12]

Datzenmike has a good point, and I've used it to test many gauges. Works the same for the temp gauge. Ground the gas tank sending unit to the chassis, and the gauge should read full. If it doesn't, the gauge/wiring is bad. If it does read full, the sender is bad. Easy way to eliminate problems.

 

 

yep that's what it dose, i have one of those kragen gages.

[Skib]

Skib if the temp is working then it's not the voltage regulator in the dash cluster. Grounding the yellow wire at the tank sender should cause a FULL reading on the gauge if it is working correctly. Because there is a single wire to the tank the tank must be well grounded for a good return.

 

If all the above passes then it must be the internal sender. The sender wires are hair thin.

 

 

I dont have a temp gauge :P Iv always had an after market one.

 

its just a blank black plate now. it comes up to 1/2 tank from time to time when I fill it up. but it dosent always do it and it dosent always stay.

 

 

I got a new flasher for the blinkers and they still dont work :rolleyes:

[djaztek12]

here a picture of my sending unit :unsure:

 

 

[hang_510]

use a rubber on the delicate wires... (a #2 pencil eraser :fu: )

[djaztek12]

use a rubber on the delicate wires... (a #2 pencil eraser :fu: )

 

wow :fu:

[hang_510]

wow :fu:

:huh: you think im lying?

[izzo]

A pencil eraser is in fact a good tool to clean things. Its used a lot on computer cards, the little gold pins etc. Keeps finger grease and other contaminates off there.

[djaztek12]

:huh: you think im lying?

 

no okay. ill try that. on the other hand i was comparing sending units. and it seems and looks very similar as a old vw bug one. i got try one to see if it works.lol

[I'm BLUE]

A pencil eraser is in fact a good tool to clean things. Its used a lot on computer cards, the little gold pins etc. Keeps finger grease and other contaminates off there.

 

Yes Indeedy it can work :hyper:

[hang_510]

I got a new flasher for the blinkers and they still dont work :rolleyes:

are the wires in good cond?

did you get the 'heavy duty' version? cant remember why, but that makes a difference and works in both spots.

[hang_510]

i got try one to see if it works.lol

check the impedence of the VW unit and if the same (0-90) it should work with the stock gauge.

[Spades]

my wagons gas gauge only works up to the 3/4 full mark, when it shows i am on E i still have well over a quarter of a tank. My factory temp gauge barely works as well, I figure its the voltage regulator, i just never bothered to check it cause I didn't figure I could find one for it. I haven't come across one yet...can you even get a new voltage regulator for a 72 510 wagon?

 

but yeah, try grounding it out and watch the needle. if the needle goes up in the dash, check the sending unit. Do you own a ohm meter? if so, hook it up to the leads and watch what the ohm meter does when you move the float for the sending unit.