Electrical Problem?

[66yostagea]

Everything seems to work OK. But the fuel gauge says the tank is full, it is only 1/4. Tacho does not indicate properly Temp gauge is on max and odo reads 999,999.

Help please Car is RS4.

Edited March 16, 2014 by 66yostagea

[KiwiRS4T]

My gauges routinely play up - all go to 0 or max. A coupe of times I have disconnected the battery and reconnected - other times they have just come right next time I start the car. Hopefully your will come right.

[Brick]

My first stop for craziness like that would be an earth fault. Check all your earth connections

[66yostagea]

Bob, you are right once again. This morning it is OK. Will watch out for it. But what causes it? I have enough earth leads to sink a battleship.

[66yostagea]

Bob. You were right, but you are now wrong. Lasted three starts then poof!

Also tried disconnecting the battery but that did not work either.

[KiwiRS4T]

Bob. You were right, but you are now wrong. Lasted three starts then poof!

Also tried disconnecting the battery but that did not work either.

Apart from checking earths the only other suggestion I have heard is to check the soldered connections on the back of the cluster and either generally wave a heat gun over it or using a very small soldering iron redo the connections.

[66yostagea]

I hope you are not talking about my cluster LOL. I take it that it is behind the dash cluster. Is that hard to get out?

[GH05T]

check all ground wires.
ungrounding things plays havok like this.

i have had heasdlights do indicators and revs bouncing up and down and horns flashing other things. can make for an interesting drive.

wet weather and early moisture may be doing it. find all of them take them off, wire brush them down check for corrusion and rust then reconnect.

[66yostagea]

In addition to the stock grounding wires, I installed a few years ago a complete system that circumnavigates the engine bay. It goes up and down, back and forth. I checked it all today and it seems secure. Should I be looking elsewhere?

Maybe Bob's, KiwiRS4T, suggestion is the way to go? So how do I check to make sure it is valid?

Edited March 17, 2014 by 66yostagea

[KiwiRS4T]

In addition to the stock grounding wires, I installed a few years ago a complete system that circumnavigates the engine bay. It goes up and down, back and forth. I checked it all today and it seems secure. Should I be looking elsewhere?

Maybe Bob's, KiwiRS4T, suggestion is the way to go? So how do I check to make sure it is valid?

There is a write-up in the DIY section but sadly the pics are lost:

http://www.skylinesaustralia.com/forums/topic/183421-led-installation-diy-tutorial/

[66yostagea]

Not done anything to it yet.

Today first start and it was all fup.Stayed that way for 30ks. Then out of the blue the fuel and water temp went back to normal but the speedo and tacho still had the dud readings. Now it is back to all fup,