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Saturday, December 20, 2008
1999 Dodge Ram Van , High Blower Only
My blower motor only works on high when switched on. Do you have a unit or a fix for a 99 Dodge Ram Van?
Sorry, we do not supply parts for your Dodge blower system at this time. If you would like to test to see what the problem is this what you will need to do. Locate the blower resistor and unplug it. It is located under the hood on the blower housing. There will be four wires. Make sure that the main a/c heater switch is on and the blower is in the low position. Take a test light and connect the clamp to the battery positive post and take the probe and touch it to the tan wire, terminal 1. It should light up. Have a helper move the blower switch to medium 1 and the light should go out. Now the light green/white wire, terminal 2 should light up. Have the switch moved up one position to medium 2 and the green/white wire, terminal 2 should go out and the light blue, terminal 3 should light up. Next have the switch position moved to high and the blue wire should go out and the green/white wire, terminal 4 should light up. If all test good then the resistor is faulty and if any of the signals are missing there will be a problem at the switch. This type of system confuses a lot of people because Dodge switches the ground side of the blower motor to control speeds. Hope this helps and let us know how your repair went.
Thanks very much. Excellent instructions. I just used a voltmeter to check for 12V instead of a light bulb. Got power at all 4 positions, and the blower motor works with 12V applied, so I know it has to be the resistor!
Thanks very much. Excellent instructions. I just used a voltmeter to check for 12V instead of a light bulb. Got power at all 4 positions, and the blower motor works with 12V applied, so I know it has to be the resistor!
3 comments:
Sorry, we do not supply parts for your Dodge blower system at this time. If you would like to test to see what the problem is this what you will need to do. Locate the blower resistor and unplug it. It is located under the hood on the blower housing. There will be four wires. Make sure that the main a/c heater switch is on and the blower is in the low position. Take a test light and connect the clamp to the battery positive post and take the probe and touch it to the tan wire, terminal 1. It should light up. Have a helper move the blower switch to medium 1 and the light should go out. Now the light green/white wire, terminal 2 should light up. Have the switch moved up one position to medium 2 and the green/white wire, terminal 2 should go out and the light blue, terminal 3 should light up. Next have the switch position moved to high and the blue wire should go out and the green/white wire, terminal 4 should light up. If all test good then the resistor is faulty and if any of the signals are missing there will be a problem at the switch. This type of system confuses a lot of people because Dodge switches the ground side of the blower motor to control speeds.
Hope this helps and let us know how your repair went.
Sparky
The Electric Connection
Thanks very much. Excellent instructions. I just used a voltmeter to check for 12V instead of a light bulb. Got power at all 4 positions, and the blower motor works with 12V applied, so I know it has to be the resistor!
Thanks very much. Excellent instructions. I just used a voltmeter to check for 12V instead of a light bulb. Got power at all 4 positions, and the blower motor works with 12V applied, so I know it has to be the resistor!
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