Possible reasons:
1. Short circuit in the reverse circuit:
* Check the wiring and connections leading to the reverse sensor and automatic transmission solenoid.
* Inspect the wire insulation for damage or chafing.
2. Reverse sensor malfunction:
* The reverse sensor may be faulty and produce an erroneous signal, which leads to the automatic transmission solenoid turning on and blowing the fuse.
* Check the reverse sensor and replace it if necessary.
3. Solenoid malfunction:
* The automatic transmission solenoid responsible for engaging reverse gear may be faulty and cause a short circuit.
* Check the solenoid and replace it if necessary.
4. Problems with automatic transmission:
* Internal transmission failure, such as burnt clutches or a faulty planetary gear, may prevent the transmission from engaging reverse and cause a short circuit.
* Have your transmission diagnosed and repaired by a qualified mechanic.
5. Malfunction of the automatic transmission control module (TCM):
* The TCM may issue erroneous commands resulting in a blown fuse.
* Diagnose the TCM and replace it if necessary.
Troubleshooting steps:
1. Check the fuse and replace it with a fuse of the same rating.
2. Conduct a visual inspection of the reverse electrical circuit and replace damaged wires or connectors.
3. Check the reverse sensor and solenoid using a multimeter.
4. If you discover a problem with the circuit, sensor, solenoid, or automatic transmission, have it repaired by a qualified mechanic.
5. Allow the automatic transmission to cool and collect the necessary tools and spare parts before carrying out repairs.