What was found
THE AIRCRAFT ENTERED ICING CONDITIONS AIRCREW SELECTED WING AND EMPENAGE DE-ICING. TIMER LIGHT ILLUMINATED IN SINGLE CYCLE, AIRCREW SELECTED CONTINUOUS CYCLE AND THE SAME RESULT FOLLOWED AND NO GREEN BOOT INFLATION LIGHTS. AIRCREW ATTEMPTED MANUAL INFLATION OF THE DE-ICE BOOTS, AGAIN NO INFLATION LIGHTS AND AIRCREW COULN'T TELL IF THE BOOTS WERE INFLATING VISUALLY. AIRCREW WAS INSTRUCTED TO RETURN TO PIT FOR FURTHER TROUBLESHOOTING.