Hawk fuel gauge problem and interesting finds

[mjstef]

Originally Posted by Musictrek

I measured the res on the sending unit. I get 86.1 ohms on the bottom float position and 20.6 ohms on the top position of the float. I'm thinking to get the gauge to read full. Maybe the ohms need to read 15? I don't know the spec on the cluster. that would be the thing to figure out. Then figure out how to change the resistance of the sending unit.

I e-mailed you but for everyone else, Fuel tank full, 09.0 Fuel tank empty, 96.6.

[LunaTech]

The values that mjstef listed are correct.
To perform my fix on the erratic fuel gauge reading do the following:
Remove and drain the tank.
Once drained remove the sending unit by removing the 4 nuts and snaking it out of the tank.

This is the bottom of the sending unit. You need to use a small screw driver to pop the "cover" off to see the bad crimp area on the yellow wire.


Next just clean the area and solder

Now test to make sure you are seeing the desired resistance readings. If so just use a little clear silicone to re-attach the "cover/plug" and install back in the tank and put everything back together.

This cured my woes on both my Hawks. I still have the 2 new sending units from CSC. Figure I'll keep them for spares just in case.

[dpl096]

Nice write up and pix Luna - well done

[Musictrek]

Thank you for that bad connection issue. I'll check mine for that