Baron Tachometer

Question

Wondering if anyone can help. I got a Baron tachometer for my 96 FLSTC.

It’s jumping a little bit. I put in a 10k resistor but nothing….

I soldered every connection. I checked the ground and it appears fine. The coil resistance checks out too. I spliced it into the pink wire that goes between the ecu and coil since there isn’t a separate wire that comes from the ecu.

The only thing I can think of now is that the coil is causing interference, but how do I know? I know a simple voltmeter can’t read RPMs, but the voltage at the pink wire at idle jumps between 8.7 and 9.2….shouldn’t the voltage be consistent at idle?

Would new plug wires help? Not sure how old the current ones are. They read 3.7k and 6.4k ohms.

Thanks for the help.

in progress 0
Chris S. 3 years 5 Answers 661 views 0

Answers ( 5 )

  1. Don’t know about the voltage on the coil wire, but that big of a difference on the plug wires would definitely warrant new wires.

  2. The rear one is half the length of the front. I thought that would justify the difference.

  3. Can’t swear to it, but I think they should still be closer together on the numbers.

  4. All coil driven tachs are jumpy. There is a capacitor-resistor filter circuit online you can build to dampen the jumpiness but otherwise it’s normal. My aftermarket one does the same thing.

  5. Would this fix the issue or just lessen it? Do you have a link or search terms that I can look at?

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