Having problems with your 2002 Pontiac Grand Prix ?

Heater doesnt work

\015 Doesnt blow or turn on\015 Posted / edited by AnonymousUser on : 14-09-2020

Answers :

The first thing to check would be the most common which is the blower resistor. the resistor is located on heater box next to blower. if you locate the blower then wire to blower and then follow wires back and they will lead to resistor.
A good test to do to see if it is the resistor would be with a test light you will test for power at blower, make sure to turn key on and heat on with blower switch on, then with the test light check for power at the blower.
if it is a bad blower resistor then you will have power at one wire on the connector that connects to blower motor, that means there is no ground going to blower, that ground is controlled by resistor to control the speed settings.its is the switch itself or resistor but i would say resistor, if you had a power probe you could test switch but i will not confuse you with that.
Now if there is no power to one of the blower wires then a fuse is what you will need to replace,
and the last test to be sure it is the resistor would be to use a piece of wire , make sure you know which wire had power to it, as you will be sticking the other wire, so take your wire and stick into connector at blower and take the other end and touch a good ground, you may see a little spark, thats okay. the blower should run.
Repair Help & Product Troubleshooting for 2002 Pontiac Grand Prix

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