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Re: Radio stop working after battery change
If your radio is the pioneer model stated, it definately has a fuse!
The little black box on the yellow wire contains a fuse.
If there is no black box on the conctant power, you may have damaged the radio with a voltage spike(s) when connecting the battery posts.
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if its the factory radio if you lose power say like the battery was change or disconneced you need a code for the radio to start working agin some dealer will give you the code if you give them the VIN
Your radio probably needs a constant live to retain the radio settings. It may be that your radio has 2 live wires. 1 live that operates the radio coming from the ignition and 1 coming from a constant live that just gives enough power to retain the memory settings.
If you are going long periods of not using the MGB I would disconnect the battery to stop the it draining. If your battery goes completely flat it will damage the battery
When you said inline fuse I get the idea that this is not the original radio. Do you have power on the inline fuse? The 50 amp fuse you checked is a bit much for a radio. There may be a smaller fuse in another fuse area of what car type you have. If you do not have power at the inline fuse find some where you do have power (12vdc) and connect to it. If you have power at the in line fuse check the ground wire. If you have a test light or someway of checking for power test all fuses everywhere. If you have a fuse location guide for this vehicle look for the fuse for radio. If it was a add on or after market radio they probably caught power from the original source That is fused under the dash.
you need to hook the yellow wire off the back of the radio up straight to the battery this keeps memory power to the head unit then wire the wires in color coded sequence red to red black to black so on and so forth if this doesnt fix it you might want to think about replacing head unit
YOU CHECK THE CAR FUSE...BUT THE STEREO HAVE ANOTHER FUSE. CHECK IT IF PROBLEM PERSIST.... I´M SORRY BUT I THINK YOU BLOWIT ,YOU MUST GO TO REPAIRED
SOME TIMES BLOW A THIN LINES INSIDE THE STEREO AND REPAIRED THOSE WORK AGAIN AND POWER AMP IN THE STEREO BLOW TOO.