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| 1994 FOur Winns Vista Tachometer https://www.smwebhead.com/phpBB3/viewtopic.php?f=6&t=23899 |
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| Author: | BoaterDan278 [ Fri Jan 09, 2026 3:46 pm ] |
| Post subject: | 1994 FOur Winns Vista Tachometer |
One of my tachometers has stopped working. 1994 Vista with twin 5L Volvo (they are 5L Ford EFI). I need to know if anyone knows how to test it without the engine running. This tachometer only has three inputs, a positive, a ground and an input. My boat is in heated storage (Northern climate), I can access it, but I cannot start it. I've searched all the obvious sources and haven't found a method. TIA |
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| Author: | Surface Interval [ Mon Jan 12, 2026 8:12 pm ] |
| Post subject: | Re: 1994 FOur Winns Vista Tachometer |
I got this from a Google search. Bench Testing the Tachometer (Gauge Only) Disconnect & Power: Remove the tachometer and connect its ground terminal (G) to the negative battery terminal and the signal (S) terminal to the positive terminal of a 12V battery or charger. Check Movement: Turn the power on; the needle should sweep to around 3500-4500 RPM if it's working. Check Resistance (Optional): Use a multimeter's ohm setting to check the coil's resistance between the terminals; a reading of 140-180 ohms often indicates a healthy coil. This won't test accuracy, but applying power to look for needle movement might be a start. You might also check the harness for power and ground. |
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