I have a Belkin Tune Cast II FM transmitter. The fuse in the DC car power cable is .5 A but it blows every time I plug it in. What is the correct fuse to use for this charger?
Those transmitters are very low amp draw... as you noted 0.5 amps, which at 13 volts is about 7 watts of power... and even that sounds high for a portable electronic FM transmitter. With that little power, you probably have a faulty unit for a fuse to blow. I assume you are using an aux 12v power source in your car and the (cigarette lighter) adapter that came with the transmitter. Now most adapters are not fused, but yours might be, and you could open it up and just see what the number on the fuse is - probably 2.5 amps max. Radioshack carries replacements for those small fuses. Considering that the car's fuse rating on most aux power sources is about 15 amps, your transmitter could not possibly draw that much unless there were a problem. The problem may lie in the aux power socket or in the adapter itself. I'd start by trying something else with an adapter - such as a cell phone charger. If plugging that into the same socket blows the fuse (in your car's fuse panel) then its probably the socket. If however it works fine, then the problem lies the adapter on your transmitter; which = return that and get a new one. I have seen many adapters with bad design that shorted easily and blow the car's fuse. Pray that its the adapter and not the socket.
If you know that's the correct fuse. You might have another problem such as the wires are shorting or grounding each other out and not completing the circuit. It might just be best to buy a new transmitter instead of wasting your money on fuses.
