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Thread: Early tach signal indicator

  1. 03-05-2025, 09:13 AM #1
    sanders
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    Early tach signal indicator

    Am I correct that a very early tach signal indicator is operated by a single wire? Not blk/green and black/white but just a blue/white. Thanks.
    Last edited by sanders; 03-06-2025 at 10:39 AM.
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  2. 03-05-2025, 03:29 PM #2
    edmayo
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    Blue/white is high beam indicator.
    Early S Registry member #90
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  3. 03-06-2025, 05:39 AM #3
    sanders
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    The harness I am using is for a 1/65 production and it mirrors a harness I took from a 12/64 production. It is from Y&Z's. The high beam indicator wire is white/blue. There is a blue/white wire with the instruction that it is for the turn indicator. At some point Porsche went to blk/white and blk/green, and that works with a tach with two indicator lights. Since the 356 and 914 just had one indicator light, I wonder if the early 911 was the same? I do not have the original tach.
    Last edited by sanders; 03-06-2025 at 10:39 AM.
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  4. 03-06-2025, 07:22 AM #4
    preS
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    Quote Originally Posted by sanders View Post
    The harness I am using is for a 1/65 production and it mirrors a harness I took from a 12/64 production. It is from Y&Z's. The high beam indicator wire is white/blue. There is a blue/white wire with the instruction that it is for the turn indicator. At some point Porsche went to blk/white and blk/yellow, and that works with a tach with two indicator lights. Since the 356 and 914 just had one indicator light, I wonder if the early 911 was the same? I do not have the original tach.
    Contact our own Steve Highsmith from 911 high voltage. He is familiar with 64 wiring harnesses

    Richard
    searching for engine (case) 903742
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  5. 03-06-2025, 10:41 AM #5
    sanders
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    I have been advised that the earliest gauges had a single indicator light. Looking for confirmation...and maybe a gauge. Thanks.
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