Jeep Wrangler Fan Switch Problems

First is the design of the circuits involved.

Jeep wrangler fan switch problems.

There is a serious product defect in the fan motor switch resister assembly in my 2001 jeep wrangler. 2003 jeep wrangler sport. This condition has been repaired seven times six times unsuccessfully the first time was in 2004 the year i bought my jeep from a dealership and the last one accomplished august 20 2009 and who knows how long this will last. Current jeep 2006 jeep wrangler unlimited.

Replaced under warranty twice. If your jeep wrangler s heater has stopped working this process has failed. Luckily nobody was hurt due to close proximaty of dealership. Jeep tj how to fix the blower fan if speed goes out or different speeds don t work.

Normal use of fan speed control switch of 1999 jeep wrangler. Second would be the blower motor. Sold and missed. In this video i am showing how to troubleshoot and pinpoint a problem on a not working air cond blower the motor with a simple tool like the test light.

The infamous blower motor switch resistor problem. Without it the engine can reach dangerous temperatures and damage engine components. The male tabs on back of switch break causing shorts and failure. The cooling fan in a jeep grand cherokee keeps engine temperatures at the correct level by kicking on during times when the engine reaches higher than average temperatures.

When your jeep reaches its optimal temperature its thermostat opens and allows that coolant from the cooling system to flow through the engine removing heat and sending it into the radiator then into the heater core which ultimately distributes it into the jeep.