99 Interstate Tach not working

[$ Ball]

Also it is a California model if that makes a difference .

[Bagger John - #3785]

Easy things (relatively easy) first.

Are all the plugs going to the dash firmly seated in their receptacles, and are they free of corrosion?

Check these.

Notice any other anomalies with that dash?

[Chrisj CMA]

You now have two posts about your tach. It's much better to keep all responses on the original so later people can go back and see how it went.

I do know a failing alternator will cause a weak battery, failure to start, and tach trouble.

Before anyone responds, you can delete the other thread and put all additional information here.

[$ Ball]

Unable to delete my own post .

[MarkT]

Don't know if this is the same as an IS but I wouldn't be surprised. On a std, Honda put the tach on the same circuit as the taillight - to let you know your taillight is out.  Get a short back there which blows the fuse - tach no worky.

[Bighead]

Don't know if this is the same as an IS but I wouldn't be surprised. On a std, Honda put the tach on the same circuit as the taillight - to let you know your taillight is out.  Get a short back there which blows the fuse - tach no worky.

Hmm didn't know this I gues my tail light is still working on the same bulb for 20 years

[$ Ball]

Got it fixed,dealer had wiring harness apart,plugged tack wire into a not used port.
P O payed them to fix stalling problems.Still had them, I tore it apart and found a Can of worms.
Got to love them bubble gum chewing kids they call techs.

[Bagger John - #3785]

...
Got to love them bubble gum chewing kids they call techs.

The shop owners get the expertise they're willing to pay for.

A good mechanic is an investment (as is a good set of tools) but many dealers think in the near-term and hire cheap.