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Sun Jun 29, 2008 5:47 am

I have a vdo fuel guage and sender (tube type) that I want to put in my 56. How do I tell if they are working before I install them? I have grounded the guage, gave it 6v, and hooked it to the sender. The guage went to full and stayed there. There was no change when moving the sender. I don't know if one is bad, which one, or did I do it wrong?

Thanks

Sun Jun 29, 2008 6:11 am

If the gauge works when power applied, it should be good. Try putting an ohm meter on the sender and working it. It should show variable resistance.

Sun Jun 29, 2008 12:19 pm

Thanks, I put it on the ohm meter and got variable resistance as the float moved up and down. How should it be hooked up? Maybe I do not have it wired correctly. I have 3 wires? 6v, ground and one from the sender?

Thanks

Sun Jun 29, 2008 6:38 pm

That, I cannot answer.

Sun Jun 29, 2008 8:23 pm

Thanks for the help. I think I got it figured out. The "G" on the gauge got me thinking ground but then it had the ground symbol as well on the third terminal. I looked online and found that VDO uses "S" or "G" for the sender terminal. I think when I hook it up correctly it will work.

Thanks for your help.

Mon Jun 30, 2008 8:02 am

Here is a technical bulletin you can reference:

http://www.thesamba.com/vw/archives/manuals/techbulletins/k5.php

Mon Jun 30, 2008 7:26 pm

Thanks. That is exactly what I was looking for. Now, anyone have a sending unit they would like to sell? When I took mine apart to inspect it the resistance filament broke and now it is pretty clear what the problem is.

I am posting a want add for a sending unit.

Thanks for all of the help.

Mon Jun 30, 2008 10:06 pm

I am on the hunt for one of these myself. I have only seen one of these particular fuel senders for sale in the past two years.