Devine intervention required.
 

I am trying to rewire my 1975 911S . Major issue with the oil temp/oil pressure gauge . What wires go where. I took pictures before dismantle but not good enough . A picture would be great if you have one.http://forums.pelicanparts.com/uploa...1490219109.JPG
http://forums.pelicanparts.com/uploa...1490219109.JPG

Hello - hoping that this DIY tech article from our site will be of use to you. Although the process is for a replacement, I think you'll still be able to troubleshoot the connections. If you have anymore questions or need specifics, feel free to post a Comment just below the article and we'll do our best to give you details. Best of luck!

Porsche 911 Oil Temperature Gauge Upgrade | 911 (1965-89) - 930 Turbo (1975-89) | Pelican Parts DIY Maintenance Article


-Dmitry

Check this thread...not that although an older version indicator, there is consistent marking on the gauge connections:

http://forums.pelicanparts.com/porsche-911-technical-forum/950278-oil-combo-gauge-repair.html

Looks like G is the connection from the sender, the + would be power and the last would be ground.

this should help
http://forums.pelicanparts.com/porsche-911-technical-forum/918244-oil-pressure-gauge-electrical-connections.html