1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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17,276 Posts
These are all communication bus faults and probably not related to any sensors. The 'bus' interconnects all the various modules so they can communicate information with one another.
The cluster doesn't know what gear you are in or how fast you are going, so all the boxes are lit and the speedo/odo are inop. The warning lights are lit and those modules are probably all storing 'no communication' fault codes themselves.
Diagnosis of the bus can get complicated. A voltmeter and wiring diagram would help. The twisted-pair bus is usually a white and a violet wire, possibly with a colored tracer stripe.
The 2.5 volt bus supply originates in the cluster and by unplugging other modules one at a time you may find which is pulling the bus down (if this is the issue). The bus is sensitive to moisture and corrosion knocking it down and taking the modules off-line. Broken cluster circuit board solder joints is another possible cause.
The cluster doesn't know what gear you are in or how fast you are going, so all the boxes are lit and the speedo/odo are inop. The warning lights are lit and those modules are probably all storing 'no communication' fault codes themselves.
Diagnosis of the bus can get complicated. A voltmeter and wiring diagram would help. The twisted-pair bus is usually a white and a violet wire, possibly with a colored tracer stripe.
The 2.5 volt bus supply originates in the cluster and by unplugging other modules one at a time you may find which is pulling the bus down (if this is the issue). The bus is sensitive to moisture and corrosion knocking it down and taking the modules off-line. Broken cluster circuit board solder joints is another possible cause.