What did you do to your kombi today ?

[Mordred]

Thanks Melissa, 

it was a joy working on Little Red and a much bigger one driving her! 

Learned a bit more about the different types of fuel gauges used and thanks to Todd Smith I had a bit of knowledge on Split Window buses wiring too.

The new gauge body was plastic instead of metal.  The new mechanism instead had an extra terminal that needed a connection to ground. As these early gauges use a voltage divider to control the voltage to the needle, without the ground connection you end up with the needle at full scale deflection (showing a full tank). By testing between the positive and sender connections and then sender and ground connections I could see the 2 resistances of the voltage divider and worked out that connecting the ground wouldn’t cause a short and blow up the gauge. I then connected a ground and knowing there would be a small amount of fuel in their tank was pleasantly surprised when it showed 1/4 full. Trip up to the servo for a top up and it shows full!.
   

Adrian