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Most of the Black box (MDC) issues can be cleared up by running a dedicated ground and battery to it. The factory installed ground is not good enough for a computer system to run correctly. Just...

It is very inportant that the black box (MDC) has a good ground and power to work correctly. There is a connector under the dash that is labled "to gauges" in that connector is a red and black that...

It is very important befor replacing the box a new ground and battery are required to power the MDC. Cutting the wires under the dash that supply the MDC box and splice wire directly to the batter...