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Registered
Join Date: Nov 2017
Location: Qatar
Posts: 645
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1987 speedometer wiring
I have a speedometer out of a 1987 930 that I need to test (using a function generator), the speedo has 4 terminals on the back (+ , - , 31b, A), the + and - are obvious, but I don't know which of the remaining two should be used to inject a square wave, I decided to check here first before trying anything so no silly mistakes would happen!
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05-26-2018, 03:49 PM
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Years ago I had an issue with my instruments
Read the post starting from here above; maybe you find some useful informations Wiring all the gauges in a 911 SC
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Paolo from Alps 1980 911 Targa SC 3.0 - Silver metallic 1980 Ducati Pantah 500 - Red 1989 Yamaha 500 "Tracker" 
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05-26-2018, 10:17 PM
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Join Date: Nov 2017
Location: Qatar
Posts: 645
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Quote:
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05-29-2018, 12:55 AM
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PORSCHE 911 SC Targa
LAMBRETTA LD 1957
YAMAHA 500 "Tracker"
