Just got this baby home and the only problem she has is that the fuel gauge doesn't work. Previous owners have said that they have replaced the sending unit. I have removed the instrument panel in attempts to Ohm out the gauge itself, but cannot get behind it.

Any suggestions or tips? Do I have top replace the whole instrument cluster?
Thanks in advance for your help!

Dave

 

First, ground tan wire in trunk/body = Empty
Second, use ohmmeter and test the tan wire referenced to ground for conductivity
This wire goes to the s/unit through the body harness.
Should read somewhere between 0 to 90 ohms, depending upon fuel level.
No continuity, check ground wire at s/unit connection to body ground and redo the connection.

Once you have an ohmic value, then to the gauge.
You can ohm out the gauge - ohm power going in to gauge
ohm gauge to ground & power to tan wire.
All three should have some resistance.

Remember, gauge is an indicator, not calibrated to any extent.
If 1/4 tank shows, then fill tank and make mental picture of gallons to gauge.

 

Thanks Everett,

I will try these measurements. I'm assuming that I have to drop the tank to get to these wires in the trunk/body? Wires are to the sending unit, right? Pardon my ignorance... and thanks a ton for your help!

Dave

 

No, should be in front of the tank - you'll see.
On tan wire, start at cluster connector and work your way back.
Body connector on drvr kick panel.
Another connector through trunk floor by latch.

You're welcome