The radio plays full volume on right channel when turned on.
Anything I tell you is going to be a guess, since there has been no testing done, and we don't have the model number of the specific radio involved. However...
For a 20 year old radio, the volume and balance is almost certainly controlled by a potentiometer that has input into one leg of the fixed resistance, and the other leg (of the fixed resistance) is grounded. The movable center tap is the output to the amplifier - and its position controls the volume to that channel. If the ground leg becomes disconnected (broken wire, or a cold solder joint, or even a break in the resistor within the body of the potentiometer) then instead of "dividing" the volume, it simply provides a slight resistance inline - short answer: It goes full volume.
You can try running the control full range back and forth, and even just the old time "slap it" approach, to see if you get any static or change. If you do, that pretty well confirms the diagnosis. [If not, it just means the break is not close to touching - still almost certainly the right answer though.]
Only fix is going to be disassembly. You then may be able to find the break (and resolder it), and/or replace the volume potentiometer. Note that if you have remote volume/balance control (controls on the steering wheel), then there is some extra wiring that can likewise be involved. jk
Feb 27, 2015 |
1995 Jeep Grand Cherokee