so I changed up the engine in my Model A and my turn signal quit flashing,both front and rear lite up but won't flash,when I put a test lite to the connection for the dash lite they flash fine, checked all the ground seems to be good, stock GM column after market front and rear lites any ideas?
Got LED's in either the front or back? If so you need a special flasher unit. If not, the flasher is prolly getting tired and the test light gave just enough resistance in the circuit to trip that flasher...try a new flasher. This really should be posted on the main board but now ya know, right?