When I use my turn signals, nothing happens - I don't even get the turn signal symbol flashing. Only my rear blinkers work, and that is only when I am holding the brakes down and manually pushing the turn signal up and down. I changed my bulbs but that did not fix the problem. I'm not sure if we've checked the fuses. I'm not a car person, but I have seen others online suggesting that it may be the turn signal switch. Is this something I could replace myself, or do you have cost estimates? Thanks.