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MEFI 4 can bus resistor

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  • 3 weeks later...

Thanks Justgary, I'm trying to diagnose my gauge problems. ( oil psi, volt, cool. temp and speedo.) read from the can harness from the ecm. All other gauges work. I've read 2005 was the first year can bus was used for the medallion computer and gauges on malibu boats.  I assumed it was like automotive can, 120 ohm resistor each end of module to produce 60 ohm termination. 

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If you are having gauge problems, it might be best to start with a thorough cleaning of all of the connections, including power, ground, and any plugs.  The cannon plug at the engine could definitely cause trouble, so check it too.

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