Failure to start falls into two categories:
Help My Jeep Won't Start - Jeep Cherokee problem Shooting
1) The motor will not turn over - the Starter motor will not run
Or
CAR+jump+battery2) The motor turns over but will not fire and run.
This article will address the first cause. If you motor turns over but will not fire see my other article.
Start by checking the Battery voltage. Most Jeeps have a voltage meter on the dash. If the voltage is low - below 10 volts, check the following:
1. Fist check to see if there is a cause for the Battery to be discharged. Were the lights left on? Doors left open or other power draining accessory left on? If so, turn off the drain and use jumper cables to start using a expensed Battery from a different vehicle.
2. If there has been no excess power drain, check the health of the battery cables. Take off the cables from the battery posts and clean the contacts. Also check the relationship of the ground cable to the vehicle body.
3. If the battery cables are clean and manufacture good experience and the voltage is still low, verify that the Alternator is functioning properly.
4. If the battery continues to fail to start your Jeep, replace the battery.
If the battery voltage is general but the motor still will not turn over, the most common cause is one of the protection interlocks. On an automatic transmission there is a Neutral protection Switch (Nss) that only allows the motor to start in neutral or park. The contacts in the Nss can corrode and cause the switch to malfunction. Move the shifter back and forth while turning the key to start. Often the request for retrial will cross a spot on the switch that still works. The Nss can be disassembled and cleaned or naturally replaced with a new unit.
If the Nss is working properly but the Starter still will not turn, you may have a defective starter or starter solenoid. The starter and solenoid are replaced as a unit on the Xj Cherokees. However before buying as transfer starter, check the wiring relationship on the starter and the trigger wire to the solenoid. Often these connections can become loose or dirty due to the rigors of off road driving. Some people have reported that starters can be disassembled and cleaned to correct problems but I have not tried this procedure.
Help My Jeep Won't Start - Jeep Cherokee problem Shooting
Recommend : Impact Wrench Car Stereo Touch Screen Best Digital Tire Pressure Gauge
CERTAIN CONTENT THAT APPEARS
