300tdi alternator

Hey,

Does anyone have a image of their alternator and the cables?

Tldr i can't find any voltage back to my battery to charge it, should there be 2 main positive cables going there? Currently I just have one that goes across the engine and behind the dash.

Thanks in advance

Nope, one cable goes to you battery or starter motor an from there to the battery (the heavy one), the other goes to you dash charging light. .
The (i think “w”) is free… can be used as input for a tachometer..
If you bulb “charging control light” in you dashboard is not burning when you put on you contact .. check the bulb.

If the engine is running and the light in the dash is not burning you should have on both side +12 volt ( use the chassis as ground to confirm)

P.s.

When you put your contact “ON” you should have on one wire (the thin one) a little less than +12 volt, the rotor and the dashboard charging light are in serie.
When the rotor has a magnetic field after the engine is started it will be 12 volt (13,6v up to 14.8v I think)