Ill offer some general notes about Porsche Electronics that I have discovered over the years.
- Connectors to no where some times are meant as such. It seems that in some cases Porsche wired their cars for all options even if they were not ordered as such (cheaper to make one harness with everything than many different ones is my assumption) or over the years accessories were removed properly (or not) and their connections left as is. Thus sometimes you will find connections that go no where but that is just where they should go.
- If it works and you start to tamper with it, it will break. Some of the hack jobs out there are terrible, if you are diving in be prepared to dive 10x deeper than you think you may need to.
- Always a good edition to any shop...
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- Grounds may not be your issue if you have cleaned them all, start looking for shorts/a burnt bulb/bad components.
- Check your wires, from end to end for continuity of you are curious about why something is not working. Most modern multimeters will have a mode for this.
- Good Luck!
Regards
Dave