Join Date: Dec 2008
Location: Barrington, RI
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Thanks Captainmeme, that's a helpful manual. Here is the schematic from p 56. Now I see where I went wrong.
This is from the trouble shooting guide I was looking at from a Yanmar workshop manual.
To check the tachometer gauge unit, proceed as follows:
1. Disconnect the red/black and black wire leads from the
tachometer. With the key switch ON, measure the voltage
betWeen the two wires. There should be 10-16 volts (battery
voltage). If not, detennine the cause.
2. Disconnect the orange and blue/red wire leads from
the tachometer. Run the engine. Measure the alternating
current voltage between the orange and blue/red wire
leads. The voltage reading should be at least one volt.
3. If the voltage reading in Step 2 is less than one volt,
check the wires and connections and check the sender as
described in the preceding section.
4. If the voltage readings in Steps 1 and 2 are satisfactory,
replace the tachometer.
I confused the red/black for the bulb with the red and black leads. I'll check it again in the morning.
, on Flickr
I appreciate the help!
sailing a P28-1 Heart of Gold on Narragansett Bay
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