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Re: [T3] Gas guage won't work!!

On 9 Feb 2005 at 19:15, Joel Briglia wrote:

> I can't seem to get my fuel guage working. I just installed a new sending
> unit from California Import Products. When I pull the wire off of the unit
> and touch it to the radio antenna, the needle on the guage goes all the way
> to full. This should mean that the guage itself is OK. Right? This problem
> really started after I reinstalled the fuel tank after cleaning it. I
> initially figured that my old sending unit was shot since it had given me a
> problem before, so I replaced it. I'm hoping that this is a grounding issue.
> What do I need to do to properly ground the sending unit?

I don't think I'd ground it to the antenna, as that leads inside your radio. It 
probably won't hurt anything, but why take that chance. Grounding it on any 
good ground should work.

The body of the fuel sender needs to be well grounded. Normally it is by virtue 
of being bolted to the gas tank.

Touch the wire to a spot of bare metal on the gas tank. The needle should go to 
full. If it doesn't, the gas tank is not grounded. It should be grounded to the 
body by way of the 4 clamps around its edges. If it isn't, check the 4 bolts 
and see if they are grounded, then the 4 clamps. Let the clamps bite into the 
tank a bit so that they make good contact.

Once the tank is grounded touch the wire to the sender body. If it is not 
grounded then loosen and tighten its bolts (don't overtighten) intil they make 
good contact. 

Once the sensor body is well grounded the gauge should work. If not, send me 
the sensor and I can fix it for you, but it would surprise me if a new sensor 
had this problem.

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

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