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'73 911 T Targa
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How to test tach before sending
I'm pretty sure my tach from my '73 911 is toast, but I'd really like to know for sure before shipping it all the way from Maryland to North Hollywood Speedo. What type of place would be likely to have the gear to test it?
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11-11-2015, 07:45 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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Just need a function generator. apply 12V power and ground. Then put a 12V square wave signal into the tach. sweep the frequency and the needle should move.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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11-11-2015, 07:58 AM
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Member 911 Anonymous
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Put yours in a know good car, I am sure your will find a Pelican in the area
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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11-11-2015, 02:23 PM
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'73 911 T Targa
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Getting the tach out requires removing the steering wheel and column shroud. I'd really feel like I was putting someone out to ask them to do that.
What kind of place would have a function generator? |
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11-11-2015, 06:14 PM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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You should be able to pull the tach on a 73. The clamshell is smaller than the earlier ones that require removal.
Any electronics test lab should have a function generator. I have one if you want to send it to TX.
__________________
Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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11-11-2015, 06:40 PM
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Member 911 Anonymous
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No, you do not have to remove the steering wheel or the clam shell.
It is tight but can be done. Just pull out the clock or fuel level gauge and reach in and push. You can also come in from the frunk.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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11-11-2015, 06:47 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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Can you make the assembly of electrical parts diagrammed by Warren in this thread? If so, I think you can test the tach yourself
tach question
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Kevin L '86 Carrera "Larry" |
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11-12-2015, 06:32 AM
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Marble Grey
