I was hoping someone could help me with my seems to be weird issue. I have one of those portable pumps/inflators to pump up tubes. Last time I plugged it in it did not work. I tested the cigarette lighter/power port and I got 12 volts. I plug my phone charger into it and it works fine. I tried the inflator and get nothing. What could it be totally perplexed, any thoughts would be greatly appreciated. It is a 1990 Sea Ray Cuddy with a Merc stern drive.