My 07 5.9 the tach sometimes goes to 0 turn key off restart motor and it works till the next time. new gauge cluster and alternator any ideas?

 

I don't know if the 07 has the same issue as the 06 does but I found this hope it helps.


Ok, with regards to the TACH issues I have a 2006 dodge ram, just bought it and I had the problem that many of you have. And paying over $100.00 closer to 200 is total crap for a 10 min fix. So here is the fix that worked for me.

1.) remove the gage cluster from the vehicle
2.) remove the screws on the back side of the cluster staring with the screws on the tach side. You will notice the circuit board will flex up about a 1/16 to 1/8 of an inch as you continue to remove the screws working from the tach side across.
3.) there are a number of IC's you should now see when you remove the
black plastic cover.
4.) if you divide the cluster in half and focus on the Tach Side there is four large IC's (talking very basic so everyone can understand). One that has leads comming out of all four sides and three that only have leads comming out of the two long sides.
5.) now this will test your skills at soldering. you need to apply flux (a Flux pen works good)to leads of the IC's and reflow (resolder) all the leads.
6.) When you put it back together I suggest to shim the board on the Tach side so the screws do not pull down on the board when you tighten down the screws.

And a link to his pictures
http://www.keepandshare.com/doc/3998...m-2-8-meg?da=y

 

Very common problem on the 06 model ,had the dealer put a new one in mine .I am an electronics tech and figured it was something simple and an easy fix,but just too lazy to rip my own dash apart.Some people remove their own and send them to Mr Wizard to be fixed and returned,they all should have been fixed under warranty..a Dodge circuit board ..good for 6 potholes or 6 yrs ,what ever happens first!..where was that **** made that a bunch of leads pop off and the worst thing is the dealer plays dumb and says they never heard of bad 06 tachs.

 

He said it has new cluster and alternator.