* Wiring Issues: This is the most likely culprit. Even with a new motor, the problem might lie in the wiring harness connecting the motor to the switch and control module. There could be:
* Broken wires: Check for any cuts, frays, or corrosion in the wires leading to the motor.
* Loose connections: Ensure all connectors are securely plugged in at both the motor and the control unit.
* Faulty switch: The wiper switch itself might be the problem, even if the motor is new. A faulty switch won't send the correct signal to the motor for the delay function.
* Damaged control module (or related component): The delay function is often controlled by a module (sometimes integrated into the body control module or a separate unit). A faulty module won't properly interpret the switch's signals or activate the correct motor function. On older vehicles, a failing resistor could also be at fault.
* Incorrect Motor Installation: While less likely with a new motor, it's possible the motor wasn't installed correctly. Double-check the installation instructions to ensure everything is properly seated and connected.
* Grounding Problems: A poor ground connection can prevent the motor from receiving the necessary power for the delay function. Inspect the ground wire for the motor.
* Fuse: Check the relevant fuse in your fuse box. A blown fuse will prevent power from reaching the motor.
* Software/Programming Issue (Less likely): Although less common on 1998 vehicles, some more advanced systems might require programming or calibration after replacing a motor. This is highly improbable but worth considering if all else fails.
Troubleshooting Steps:
1. Check the fuses: This is the easiest first step.
2. Inspect the wiring: Carefully examine all wires leading to and from the wiper motor for damage.
3. Check all connections: Ensure all connectors are securely plugged in.
4. Test the wiper switch: Does the motor work on the other settings (high and low speed)? If not, the problem might be the switch or the power going to it.
5. Test the motor: If possible, test the motor outside the vehicle to verify it functions correctly with a direct power source. (Use caution when directly connecting to a power source, follow proper safety guidelines).
6. Consult a wiring diagram: A wiring diagram for your specific 1998 Chevy S10 will help you trace the wires and identify potential problem areas. These can be found online or in a repair manual.
If you're not comfortable working with car electronics, it's best to take your S10 to a qualified mechanic for diagnosis and repair. Attempting to fix electrical problems without proper knowledge can lead to further damage.
