Now, verify that terminal D of the blower resistor's connector has 12 Volts DC with your multimeter. With the key in the on position and the blower speed knob to M2. The following links will help you comparison shop for the blower motor resistor: Where To Buy The Blower Resistor And Save This is no cause for concern since the circuit descriptions are the same for all of the GM vehicles covered by this repair tutorial. NOTE: There's a good chance that the color of the wires described above DOES NOT match what's on your particular vehicle. These 4 wires supply it with specific signals and in the following chart you'll find a brief description of each: Blower Resistor Circuit Descriptions The blower motor resistor's harness connector has 4 wires coming out of it. Even when this happens, troubleshooting the blower resistor assembly is still not hard and I'll show you how in this tutorial. Unfortunately, sometimes the individual coils look OK, but are not letting the current pass on to the blower motor. When this happens, one or all three of the first speeds stop working and you can (usually) remove the blower resistor and see one (or several) of the resistor coils have burned and are ‘open’. Over time and use, these resistors burn up. This process causes these resistors to get extremely hot. To explain this a bit further, this is due to the nature of how a resistor reduces the voltage that passes thru' it by converting some of it into heat. When the blower motor resistor fails, 1 of the 3 or all 3 first speeds stop working. ‘HI’ is the only blower speed that doesn't depend on the blower resistor to function. The reduction in blower fan speed is accomplished thru' resistors (inside the blower resistor assembly).
#Suburban air conditioner control panel harness connector how to
How To Test The Blower Motor (GM 4.3L, 5.0L, 5.7L).īasics Of Troubleshooting The Blower Motor ResistorĪs you're already aware, your pickup's heater control panel gives you the option of 4 different blower motor speeds.How To Test The Blower Control Switch (GM 4.3L, 5.0L, 5.7L).This tutorial compliments this one on testing the blower motor resistor: TEST 2: Using A Jumper Wire To Bypass The Blower Resistor.TEST 1: Verifying Blower Speed Switch Voltage Inputs.Where To Buy The Blower Resistor And Save.Basics Of Troubleshooting The Blower Motor Resistor.
0 kommentar(er)
