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The tach on my '89 1500 GW has started to read about 1500 RPM too high. On shifts, it goes into the red when I know the motor is not revving at that level. Any ideas how to fix the problem?. Thx, Schweg
 

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There are only two wires (not counting the bulb) on the tachometer. One (yellow/blue) wire connects to the engine control module (ECM). The other (green) wire connects to ground.

The possibilities are:

1. Loose/dirty/corroded connections at the tachometer
unit, at the ground point or at the ECM.

2. Faulty tachometer unit.

3. Faulty signal coming from the ECM.

That's about it..........
 

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:waving::waving: Welcome to the World's Greatest Goldwing site Schweg! :waving::waving:

It's kind of hard to give you any useful information unless you have some way to measure the actual rpm vs. the indicated rpm. Even with the suspected error that's a pretty high shift point for a 1500, normally up shifts around 2500-3000rpm are commonly used unless you're trying to squeeze maximum performance acceleration. With the torque available from the six cylinder engine upshifts can be done earlier at lower rpms and provide good performance, smoother shifts and longer lived clutches and shift forks.
 

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Is this an intermittent issue? The tach on my '89 occasionally reads about double. Lots of redlining during relatively tame acceleration. Then all of a sudden it will work corerctly for a few days. I suspect a loose connection, but haven't taken the time to check it yet. That may have to be a rainy day project.
 

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denno55. It stopped reading high on one of my weekly trips, then started again....you're probably right about a loose connection. Schweg
 

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Welcome from the state of Pennsylvania!





 
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