tacho conversion for TS into 105 which wires? - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 6 (permalink) Old 08-09-2015, 02:59 AM Thread Starter
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tacho conversion for TS into 105 which wires?

Hi Guys, could someone identify the red, yellow and blue wires in the photo below.

I have used the tacho guts from the 75 and mounted it to the 105 dial and I'm not sure which wires are which. Assume 1 is ground, one is signal and one is positive?

I have read the brown/white wire on the engine loom coil connector is what I should be hooking up to.

Any help greatly appreciated.

thx

Chris
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post #2 of 6 (permalink) Old 08-09-2015, 08:56 PM
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I just Googled "Alfa Romeo GTV wiring diagram" and got a whole lot of images. I clicked on one of many that looked familiar and it produced an S2 European 1750 GTV wiring scheme. If you surf around in there I'll bet you find what you need.

Andy Steben '71 1750 GTV (daily driver & track day car)
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post #3 of 6 (permalink) Old 08-12-2015, 02:19 AM Thread Starter
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Quote:
Originally Posted by ALFAB4U View Post
I just Googled "Alfa Romeo GTV wiring diagram" and got a whole lot of images. I clicked on one of many that looked familiar and it produced an S2 European 1750 GTV wiring scheme. If you surf around in there I'll bet you find what you need.
Sorry but I did search around before I posted and I can't find anything about the internal wiring of the TS tacho. I have standard wiring diagrams for the 105 it's the TS tacho I need.
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post #4 of 6 (permalink) Old 08-12-2015, 03:26 AM
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I think yellow is the tach signal, red is live and blue is earth
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post #5 of 6 (permalink) Old 08-12-2015, 03:42 AM Thread Starter
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I think yellow is the tach signal, red is live and blue is earth
Thanks. Did you get yours working in the end or what did you do?

Cheers
Chris
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post #6 of 6 (permalink) Old 08-12-2015, 11:51 PM
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Thanks. Did you get yours working in the end or what did you do?

Cheers
Chris
Nah. I have one that sort of reads, but i think reads about 1.5k under what it should. So im still trying to figure it out!

I have an electronic rev counter from an s2/s3 spider to try next!
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