How to Replace the Neutral Safety Switch in a Jeep Wranglerby William Boyce
The neutral safety switch --- or neutral start switch --- is an important safety component in your Jeep Wrangler. It prevents the engine from starting while the transmission is in a drive gear. The neutral safety switch and backup light switch are combined in one unit. The switch is located on the transmission oil pan.
Remove Neutral Safety Switch
Loosen and remove the negative better a cable from the battery, using a wrench.
Lift up the vehicle with a jack and lower onto jack stands.
Detach the wiring harness from the neutral safety switch.
Place a container under the transmission pan to catch transmission fluid.
Use a wrench to loosen and remove the screws that hold the safety switch on the transmission. Let the transmission fluid flow into the container.
Install the Neutral Safety Switch
Install the new switch and gasket and tighten the screws with a wrench. Tighten the screws with a torque wrench to 24 foot-pounds of pressure.
Connect the wiring harness to the switch.
Test the switch by putting the transmission in park, then neutral, each time attempting to start the engine. The engine should only start in these positions and is faulty if it starts in any drive gear.
Lift the vehicle with a jack and remove the jack stands. Lower the vehicle onto the ground.
Pour the transmission fluid from the container into the filler tube in the engine compartment. Test the fluid level on the transmission dipstick with the engine running and top off as necessary.
- "Jeep Wrangler Automotive Repair Manual"; Mike Stubblefield and John H Haynes; 2004
Things You'll Need
- Wrench set
- Jack and jack stands
William Boyce started writing professionally in 2009. His work has appeared on FreePress.net and his own blog. Boyce was a registered professional forester in central British Columbia for 24 years. He has a Bachelor of Science in forestry from the University of British Columbia.