Replaced alternator and battery and car runs poorly on 2006 Dodge Charger

When I picked my car up from the shop lights were in such as brake light and others. So I drove home and noticed it wouldn't pick up speed and the speedometer wasn't working at all neither was the radio what could be the problem now.

Asked by for the 2006 Dodge Charger
1 answer
SOUNDS LIKE THEY DIDN'T DISCONNECT PWR WHEN REPL ALT AND SHORTED OUT SOMETHING.RETURN FOR WARRANTY