I have a 1987 Jeep Cherokee XJ Laredo, 4.0L, 4wd. Ok... now this is driving me INSANE.
My temp gauge constantly stays about one notch above the left most notch. It is in this position whether the jeep is on, off, hot, or cold. If I move the gauge needle by hand to any position, the second I turn the key to ON, whether the jeep is hot or cold, the needle returns to this same position. I figured that it was probably the sensor, so I replaced it - and still the same.
From what I have read, the gauge has a 12v input and a variable ground from the sensor. So I checked the ground on the sensor and there is no ground hot or cold. I'm not sure if this is how it should be or not. Perhaps it is a possibility that I got a defective sensor, but I want to be sure before removing it again and spewing coolant everywhere.
My temp gauge constantly stays about one notch above the left most notch. It is in this position whether the jeep is on, off, hot, or cold. If I move the gauge needle by hand to any position, the second I turn the key to ON, whether the jeep is hot or cold, the needle returns to this same position. I figured that it was probably the sensor, so I replaced it - and still the same.
From what I have read, the gauge has a 12v input and a variable ground from the sensor. So I checked the ground on the sensor and there is no ground hot or cold. I'm not sure if this is how it should be or not. Perhaps it is a possibility that I got a defective sensor, but I want to be sure before removing it again and spewing coolant everywhere.
Feb 26, 2007 at 9:58 AM