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Old 10-29-2017, 01:52 PM   #1 (permalink)
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Default Adding tach to 1990 Sammi

I have a 1990 8V EFI 1.3L engine. I have looked at all the wiring diagrams for the Sammi but the only one that shows the actual wiring I have, the color codes are blurred so bad I can't read them.
Any help on which lead I should tap into for the tach signal would be greatly appreciated. Also the location for that lead.
Thanks in advance.

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Old 10-29-2017, 02:19 PM   #2 (permalink)
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The brown wire from the noise suppressor goes to the tach.

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Old 10-29-2017, 02:21 PM   #3 (permalink)
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Grab a copy of this for future use

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Old 10-29-2017, 05:54 PM   #4 (permalink)
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Thanks Darrell.
I was not looking at the correct unit that is called the Radio Noise suppressor. I now see the Brown wire that will be used as the tach lead.
Thanks again Darrell for the wiring diagram and your help.

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Old 11-08-2017, 10:55 AM   #5 (permalink)
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Hi Darrell.
I hooked up a tach (battery and ground) and the tach signal lead to the Brown lead on the noise suppressor and my tach just wanders all over the place with various numbers on the display. I am really at a lose as to why this is happening and also am I on the correct lead ??? Please advise. Thanks in advance
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Old 11-08-2017, 01:07 PM   #6 (permalink)
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Are your using an aftermarket tach, maybe it doesn't like the noise suppressor, I'd try connecting the signal lead straight on the coil negative terminal or brown/white wire.
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Old 11-08-2017, 02:40 PM   #7 (permalink)
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I'll try that now and get back to you.
Thanks Darrell.
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Old 11-08-2017, 02:50 PM   #8 (permalink)
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I tried the - coil lead (Br/Wh) and had the same effect . The tach is good as I tried it on another car (not a Samurai) and it works.
Any other suggestions ??
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Old 11-08-2017, 02:51 PM   #9 (permalink)
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This is an EFI Sammi if that makes a difference.
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Old 11-08-2017, 03:00 PM   #10 (permalink)
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Quote:
Originally Posted by DocPaul1 View Post
I tried the - coil lead (Br/Wh) and had the same effect . The tach is good as I tried it on another car (not a Samurai) and it works.
Any other suggestions ??
I'm afraid I don't
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