Based upon inspection of your radio, we have determined that a fuse larger than the recommended size was used. Using a larger fuse can cause severe internal damage and void the warranty.
There are 3 main reasons why a fuse would continue to blow:
- The power leads are connected backwards.
- The vehicle has a positive-ground electrical system. This applies to all models except the 21, 25, 29, and 148 (these models are compatible with positive-ground).
- An internal malfunction inside the radio.
If you have verified that the wiring is OK and the fuse continues to blow, then there is a defective part inside the radio. Using a larger fuse will NOT solve the problem. A larger fuse will cause excessive current to flow into the radio, causing circuit traces to burn. When the circuit traces burn, the radio is no longer repairable. A radio that may have been easily repaired is now totally unrepairable. In addition, using a larger fuse can create a fire hazard.
For these reasons, please never use a fuse larger than the recommended size:
All mobile CBs except the 148: 2 amps
All variations of the 148: 3 amps
All handheld CBs: 2 amps