1974? w-200 440/dana 60 swaped on 35s
i bought i 87 or 89 d250 with cummins in it and the turn signals and brake lights have worked for a couple months. just randomly the back ones went out. the rear bulbs work for the runing lights but not the signals or break lights. the front ones still work. they are aftermarket led ones though. y'all got any ideas on what could be wrong.