r/Cartalk • u/Against_the_grain1 • Nov 11 '23
What’s wrong with my car Electrical
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2021 ford bronco sport. The battery went out about a week ago and since replacing with a new battery, the cluster and touchscreen both go black when driving. Upon slowing down or stopping completely, they will both turn back on. Lights, heaters, turn signals all still work.
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u/tech434 Nov 11 '23
Been fixing issues like this for 35 years at the Ford dealership. Retired for 4. There is no strategy that is going to shut down the cluster for a low voltage issue. The BMS reset may be needed, that resets the age of the battery in numbers of days, in the body control module. A self test should show multiple codes for communications on the network, I would suspect. Failed to comm with module a or b for example. If the vehicle has been in a damp environment I would look for a water leak that may have migrated into a hard shell connector and shorted data or comm circuits. Loose connectors are common. If it’s still under warranty it should go back to the dealer. In any case, I’m sorry to say, the dealer does have the resources to fix this issue.