1. The Obvious Checks:
* Fuses: Check the wiper fuse(s) in the fuse box (usually under the hood or inside the cabin, consult your owner's manual for the location and the correct fuse rating for the wipers). Replace any blown fuses. *Important*: If a fuse blows immediately after replacement, there's a short circuit somewhere in the system – don't keep replacing fuses until you find the short.
* Wiper Switch: Make sure the wiper switch itself isn't faulty. Try all positions (intermittent, low, high). A faulty switch is common.
* Wiper Motor: Listen carefully when you turn the switch on. Do you hear any clicking or whirring from the motor (located under the hood, usually near the base of the windshield)? No sound usually indicates a problem with the motor, wiring, or the switch.
* Fluid Level: While unlikely to completely stop the wipers, ensure you have sufficient washer fluid. A low level might trigger a safety mechanism in some vehicles to prevent wiper operation.
2. More Advanced Troubleshooting:
* Wiring and Connections: Check the wiring harness leading to the wiper motor for any loose connections, broken wires, or corrosion. This is often overlooked but a significant source of problems. Pay close attention to the connections at both the motor and the switch.
* Wiper Linkage: Inspect the wiper arms and linkage for any damage, binding, or obstructions. Sometimes something gets jammed, preventing the arms from moving. Try gently moving the arms by hand to see if they're free.
* Ground: A poor ground connection can prevent the motor from working. Check the ground wire connected to the wiper motor for corrosion or a loose connection.
* Wiper Motor itself: If all else fails, the wiper motor itself might be defective. This requires replacing the motor.
* Relay: Some wiper systems use a relay. Consult your wiring diagram (available online or in a repair manual) to locate and test the wiper relay. A faulty relay is a possible culprit.
* Park Position: Ensure that the wiper arms are parked correctly. A mechanism may be preventing the arms from moving to the parked position, thus stopping the operation of the wipers.
3. Getting Help:
* Repair Manual: A repair manual specific to your 1998 Chevy Blazer will have wiring diagrams and detailed troubleshooting steps.
* Online Forums: Search online forums dedicated to Chevy Blazers. Someone might have experienced the same problem and offered a solution.
* Mechanic: If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic for diagnosis and repair.
Remember safety first! Disconnect the battery's negative terminal before working on the electrical system. If you're unsure about any step, seek professional assistance.
