Hi,my display bulb on my yamaha cdx-750e has blown,does anyone know the voltage-wattage of this bulb?its only a small bulb with a orange rubber holder and a red and white wire,i think this cd player is 10 years old.thanks shane
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These use a dual element bulb. It's 2 bulbs in one. The brighter element inside the bulb is used for the BRAKE light & turn signals. The second, dimmer element in the bulb is for tail lighting during night driving. Because they're on the whole time you drive at night they tend to wear & burn out sooner then the BRAKE light element. Assuming they're both the same age, they would burn out close to around the same time. Replace the bulbs. However, the tail lighting/running lights are also on separate wiring too. So check for damaged, rotted, or shorted wiring or bulb sockets, & also check the running lights fuse. If the fuse is blown, it's a good sign you have shorted/bare wiring, or damaged socket.
The voice coil(s) of the speakers (replace the individual failed speakers as you can't replace the voice coil separately) or the amplifier's output transistors / vacuum tubes - or - both. That was a loud and potentially expensive scream.
I had similar problems on headlight and I solved them installing relays on high beams. It worked well, if you don't know how to do it just ask. Anyway, if the voltage is getting to the bulbs right (the relay should assure this (try to put a direct wire between the positive on the battery and the pin of the bulb, to see if things change: if so, the relay is bad or badly fitted)), if the bulbs are new, and the exterior lenses are in good shape, then it can only be the inner reflective surface. I heard people that removed the headlight form the car, filled it with water, some sand and whatever through the bulb hole, and, shacking the whole headlight, cleanig them, but I didn't ever do it personally. Try the test of the wire between the battery and the bulb, if there's any change in brightness then the fault you're looking for is electrical, and can be restored with well installed relays.