Instead of bypassing the switch, you should troubleshoot the underlying problem causing the issue. Common reasons why the PNSS might be malfunctioning include:
* Faulty PNSS: The switch itself might be worn out or damaged. This is the most likely culprit and requires replacement.
* Wiring problems: Check the wiring harness connected to the switch for broken wires, loose connections, or corrosion. Repair or replace damaged wiring.
* Shift linkage issues: Problems with the shift linkage can prevent the switch from engaging correctly. Inspect the linkage for proper adjustment and wear.
* Transmission problems: In rare cases, internal transmission problems might affect the PNSS's operation. This would require professional diagnosis and repair.
Troubleshooting Steps:
1. Inspect the PNSS: Locate the PNSS (usually on the transmission itself or on the steering column). Visually inspect it for damage.
2. Check the wiring: Carefully examine the wiring connected to the switch for any breaks, loose connections, or corrosion. Use a multimeter to check for continuity and proper voltage.
3. Test the switch: Use a multimeter to test the switch's functionality according to its specifications (you'll need a wiring diagram for your specific model).
4. Check the shift linkage: Make sure the shift linkage is properly adjusted and moves freely. A misadjusted linkage can prevent the PNSS from engaging correctly.
5. Consult a repair manual: A factory service manual or a reputable repair guide specific to your 1993 Jeep Cherokee will provide detailed diagrams and instructions for diagnosing and repairing the PNSS and related components.
If you're not comfortable performing these repairs yourself, take your Jeep to a qualified mechanic. They have the tools and expertise to properly diagnose and fix the problem safely and correctly. Attempting to bypass the PNSS is extremely dangerous and should be avoided at all costs.
