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Discussion Starter · #1 ·
I just picked up a 2004 Dodge Ram 2500 with the cummins. The previous owner installed after market gauges made by Maximum Performance. There is a Turbo Boost gauge which works and Trans Temp and a Exhaust temp which dosent work at all.

Any ideas on how to fix it?

Thanks
 

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i agree with HOLYSMOKES, it could be electrical. most boost gauges are mechanical and the other two are electrical. it could also be something as simple as a fuse, the previous owner may have wired a fuse in line to keep from shortin out the truck. good luck with it though
 
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