Here's what you should do:
1. Locate your fuse box: There are usually two fuse boxes in a 1998 Oldsmobile Bravada: one under the hood and one inside the vehicle, often under the dashboard on the driver's side. Consult your owner's manual to find the exact locations and a fuse diagram. The diagram will show which fuse controls which circuit.
2. Check the fuses: Carefully inspect the fuses related to the horn, rear window defroster, and cigarette lighter. Look for blown fuses – they'll usually have a broken filament visible through the transparent top.
3. Replace blown fuses: If you find any blown fuses, replace them with fuses of the *same amperage rating*. Using a fuse with a higher amperage can damage your vehicle's electrical system.
4. Test after replacement: After replacing the fuse(s), test the horn, rear window defroster, and cigarette lighter to see if they are working.
If replacing the fuses doesn't solve the problem:
* Check for other potential problems: A short circuit could be the cause. This would require more advanced troubleshooting.
* Consult a mechanic or auto electrician: If you're not comfortable troubleshooting electrical issues yourself, it's best to take your vehicle to a qualified professional. Continuing to use the vehicle with short circuits could lead to a fire hazard.
Remember safety first! Disconnect the negative battery terminal before working with any electrical components to prevent accidental shocks.
