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sjbarney23

Dashboard electronics

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sjbarney23

Hi All,

I am currently having trouble with all of my gauges (speedometer, gas gauge, oil pressure, perfect pass, etc.) Not sure if it is a fuse or what? Any thoughts or suggestions? FYI, the radio, interior & exterior lights, bilge pump, blower, etc. seem to work fine.

Thanks

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Stevo

Not sure if you have the medallion unit but it is common to have its share of intermittent problems, often attributed to a bad ground, or a bad unit

Edited by Stevo

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Bturner

The early Medallion gauge systems suck, period. After struggling with my share of problems I've written several long winded posts on how they work and why they suck. The early packages are so bad the new trend is to replace them with standard gauges and ditch the MDC. If you do a google search on "Medallion Marine Gauge Troubleshooting" you'll get pages of people experiencing issues with these junk gauge packages and a link to a troubleshooting guide that Bakes has on their Web Site. You'll also probably find a link to one of my rants which outlines how I go about PD/PSI on one of these systems.

The very short version is you either have one or all (due to the overall poor implementation of this system) of the problems below....

Bad electrical connection, ground or hot.

Bad gauge(s). This will cause noise on the data bus and screw everything up.

Bad MDC. The MDC is not even close to waterproof and isn't even built to Marine radio standards.

Noise from installed electrical devices.

Low input power from a failing battery.

Improper of poorly designed ground circuit (very common in boats)

Bottom line is if you're looking for a hobby trouble shooting these gauge packages can provide you hours of entertainment. Good luck with your efforts.

Edited by Bturner

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wienrdog

Other problem others have found & reported is a blown fuse on one of the two power inputs to the MDC. Hopefully yours is just one of those blown fuses.

There is also a wiring diagram and additional troubleshooting information on the Epic Marine site - http://www.epicmarine.com/docs/MDCtrouble.PDF

It may be the same guide.

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sjbarney23

I have a 1998 Malibu Response. I did replace that MDC (affixed under the steering wheel) unit a few years ago so that could be the problem. Thanks for the replies.

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Lr110

welcome to the club

 

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LivSiladi

These common things can happen in your case Bad electrical connection, ground or hot,Bad gauge. This will cause noise on the data bus and screw everything up. Bad MDC. The MDC is not even close to waterproof and isn't even built to Marine radio standards. Noise from installed electrical devices. Low input power from a failing battery. Improper of poorly designed ground circuit.

 

pcb assembly

Edited by LivSiladi

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