Instead of looking for a fuse, troubleshoot these components:
* Cooling Fan Motor: Test the fan motor directly for proper operation using a jumper wire and 12V power source (Caution: Always exercise extreme caution when working with car's electrical system. Disconnect the negative battery terminal before working on any electrical components.). If the motor runs, the problem lies elsewhere.
* Thermal Switch: This switch, located in the radiator, is activated by coolant temperature and triggers the fan. A faulty switch will prevent the fan from engaging. You'll need to check this switch's continuity with a multimeter.
* Coolant Temperature Sensor: This sensor sends a signal to the PCM (Powertrain Control Module) which then controls the fan. A faulty sensor might give inaccurate readings, preventing the fan from turning on even when needed. This will require a multimeter to check for the proper resistance reading according to your Corvette's service manual.
* Wiring and Connections: Inspect all wiring and connectors related to the cooling fan for damage, corrosion, or loose connections. A broken or corroded wire is a common culprit.
* PCM (Powertrain Control Module): In some cases, a faulty PCM can prevent the fan from working correctly. This is a more advanced troubleshooting step and may require professional diagnostics.
Consult a Repair Manual: A repair manual specific to your 1985 Corvette is highly recommended. It will provide detailed diagrams and instructions for troubleshooting your cooling fan system.
In short, your time is better spent checking the components mentioned above rather than searching for a nonexistent dedicated fuse.
