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Join Date: Apr 2000
Location: San Francisco, CA
Posts: 610
Wiring Connections at Speedometer For 87 911?

Anyone know which terminals go to which wires on the back of a 1987 911 speedometer?

Here's are the connections I saw prior to removing my speedometer for repair. Have reconnected them as I saw them, but both the speedometer needle AND odometer are not working. Gauge was professionally rebuilt and bench tested fine. I haven't tested for 12V at the Red/Blk wire. Maybe a good place to start troubleshooting? I did find a chipmunk/mouse nest under the tunnel cover, so will check to make sure the wiring (one green, one brown, per my Bentley manual) to the speed sensor is in tact. Any other things to check?

Red/Blk Wire ----> + terminal

Brwn/Red Wire TO A terminal

Two Green Wires TO 31b terminal

Two Brwn Wires TO - terminal

Old 09-30-2017, 11:27 PM
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Join Date: Sep 2014
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Here's some pics of mine. I have more from different angles.






Old 10-03-2017, 05:54 AM
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1987 , odometer , speedometer


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