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Re: Datsun B210 Tachometer wiring in car where it didn't come stock issues
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Good work so far. The 4-pin connector might be under-hood and i think a likely source of the trouble. In the last 45 years somebody may have pulled it apart -- i seem to remember it is the test connector for the ignition

it may also be covered with tape. Are there any bulges in the harness under the hood?

at a guess perhaps somewhere near the firewall or under the black metal box next to the coil

Posted on: 10/10 18:42
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Re: Datsun B210 Tachometer wiring in car where it didn't come stock issues
No life (a.k.a. DattoMaster)
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That tach was the hardest thing to search for in the Pacific Northwest. After my car was totalled, I sold it to someone in the Seattle area for $50.
When I pulled it from the junkyard I cut the plug off the wire harness but found out that the plug was just a standard option on the wire harness because car had one.

Posted on: 10/10 22:16
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Re: Datsun B210 Tachometer wiring in car where it didn't come stock issues
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The guy who owned the car before me had done some weird stuff to the ignition, so I think you're right in that it may be pulled apart right now. I'll check tonight if I see anything under the hood. I didn't see anything when I checked under the black box next to the ignition, but I'll check again to be sure. Currently my dash is all ripped apart but I need the car for tomorrow so if I can't find anything tonight, I need to wait until the weekend. I apologize in advance if I can't give an update for a while.

Posted on: 10/12 20:59
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Re: Datsun B210 Tachometer wiring in car where it didn't come stock issues
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As far back as I can remember, accessory plugs were wrapped with blue tape to identify them, but I have also have seen yellow tape used, this may help you in locating them.
Also later model vehicles that had electronic ignition used a "tach resistor" in the circut to get it to function. If yours requires one and it's not there the tach won't work no matter what you do. Check a wiring diagram for your year and model to be sure.

Posted on: 10/13 19:04
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