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Mon Mar 01, 2010 7:46 am

I've been fighting electrical problems and am having a difficult time reading the new wiring diagrams from Bentley. I could handle the old ones but I'm lost with these new ones. The part that is giving me the most trouble are the circles with numbers / characters in them. What do they represent?

For example: At the '+' battery termal, a black wire goes to 30 on the starter, red wire goes to 88z on a double relay. Those I understand. There is also a red/white wire that goes to a circle with a '+' in it? A grey wire going to a circle with a '6' in it. At the '-' battery termial, there is an orange wire going to a circle with an '8' in it and an orange/white wire going to a circle with a '17' in it. There is also a yellow/red wire coming from the middle of the battery (not + or -) going to a circle with a '7' in it.

If someone could explain how to read this, it would be greatly appreciated.

Mon Mar 01, 2010 8:01 am

The numbered orange circle means that wire leads to the test network socket, the number is the terminal number in the socket.

Mon Mar 01, 2010 10:12 am

Where is the test socket supposed to be located? I have no 8 & 17 wires coming from the ground side and the 6 and + wires from the possitive side are cut and taped off. Also, what gives with the wire on the diagram coming from the middle of the battery?

Is it safe to say I can ignore the wires going to the test socket when trouble shooting or could a break / short be possible in one of those as well?

Mon Mar 01, 2010 11:33 am

Yes you can ignore the wiring to the test socket. It sounds like your test socket has been removed to start with, many have.

The numbers in the squares mean something entirely different, if a wire (in current track #4 goes to a square with the number "70" in it that means you need to look at current track #70 to find out where that wire connects, there you will find a similar square having say "4" in it signifying a connection.

The VW current track style diagrams are very easy to use once you become used to them. With the complexity of the wiring in a later FI bus it would be just short of impossible to figure out the wiring using the old style diagram. I wish they would at least teach a little bit of this stuff to everyone in school, instead we seem to want to dump people out on the streets blind, deaf, and hobbled, and then expect them to find their way quickly down the streets.

FWIW, the original battery had a level indicator coming from the center of the battery.