Re: Battery sensor
Not familiar with the cherokee, but you mean the battery temperature sensor which sits under the battery? This sensor is used to regulate the charging voltage to the battery, with lower temperatures, a higher voltage is used to charge the battery.
Not sure on the XJ, but on the WJ this temperature signal is also used for the OBDII diagnotics. Some monitors will not run below a certain temperature.
I donīt know what simply disconnecting of the sensor will do. What happened to the sensor on your jeep?