Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
When crossing the battery terminals, this can cause any fuses, links, diodes, or relays to fail. They all need to be checked. It can also cause modules and sensitive electronics to fail. When you say no lights are you referring to the back lighting in the cluster or the warning lights as well?
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Sorry you decided to close your post, rather than letting me continue once i got more info.