So I was reading my manual to find out what bulbs my taillights take due to having a turn signal bulb as well as a brake bulb that are out. It shows that it takes a GE 1157, 12-volt in the stop/turn/taillight. Everywhere I look it shows the GE 1157 has the round BAY15d base on it. When I took the tail light off to get to the bulbs I pulled two different bulbs 1- T3156(turn signal) and 1- 3357(brake), both of them have the wedge W2.5x16d style base. It is a 2002 Fleetwood Discovery 37T. Why would it be different then what the owners manual says it should be? I am wondering if this is why my turn signals are not working correctly and blowing fuses constantly. Any help would be greatly appreciated.