Peter BigBear Boccelli Jr.

05 cv713 gauges shut off while driving

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Pull the gauge cluster from the dash...takes about 10 minutes once you find the right bit for your screwdriver. There is a single plugin in the back of the cluster remove it and clean with contact cleaner, clean the plugin and the contact in the back of the cluster. Apply some dielectric grease after cleaning then install the cluster back in the dash...this may fix your problem for hours, days, or weeks or more...i did this to my CV713 for a year about once a month...then ended up buying a new cluster...problem solved. So if the cleaning works for you, set back enough money for a cluster as the truck keeps working.

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Sounds like you need a new cluster. The pins break off of the circuit board. Had the same problem with my '03cv713, tried everything with the plug, new cluster fixed it. Was about $600.

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Just out of curiosity here, the service bulletin for the 02 and earlier (03 maybe?) wont apply here? I ask because my truck at work is an 05 vision (sorry don't know my mack model numbers yet) and suffers from gauge drop out constantly, as does the 03 vision, and its not the first mack I have driven that has suffered from gauge drop out, a few granites did the same thing. Its getting irritating at this point.

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Seen it a lot definitely a pin loose on circuit board see it all the time but do make sure the the grounds are tight there is a bulletin for that take the wire terminals off the ground bolt and clean them

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On 7/17/2013 at 8:40 PM, Mackmaster862 said:

Seen it a lot definitely a pin loose on circuit board see it all the time but do make sure the the grounds are tight there is a bulletin for that take the wire terminals off the ground bolt and clean them

Where can I get a copy of this "bulletin"? I would like to know where to find all the grounds.

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I did the whole bulletin, added the extra ground wire and still ended up replacing the cluster. Found a guy on Ebay with a new cluster, in the box, that passed the production number "test". You have to have them send you a picture of the production number on the "NEW" cluster so you don't end up with a reject outdate. Hopefully Mack threw out the old productions, or they died of natural causes, but there are still some floating around out there, I'm certain.

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This is accurate for repair.

Cluster fix.pdf

The problem went away for a while, but now it's back. This is on an 08 gu713 granite. All I did was plug and unplug the 3 connectors on the back side of the cluster.

The cluster goes in and out anytime, but primarily at start up.

The cluster will also lock during operation (all gauges stick at current position). The only way to unlock, is to disconnect the ground at the battery. Cycling the key on and off does nothing.

The pdf you attached earlier is for 2002 models and older. Is there something similar for the 2008 models?

Any help is appreciated.

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