1970 Chevy Pickup Blower Motor Wiring Diagram

Anyone who owns a 1970 Chevy Pickup knows how important it is to have a fully functional blower motor. The blower motor is responsible for providing the necessary air circulation to keep the vehicle’s environment comfortable. However, over time, the wiring of the blower motor can become frayed or damaged, which can cause the motor to fail. In this article, we will look at the wiring diagram for a 1970 Chevy Pickup Blower Motor and provide some FAQs to help you troubleshoot any problems you may have.

Wiring Diagram

Before you begin any work on the blower motor, you should have a clear understanding of how it is wired. The following diagram shows the wiring for the blower motor in a 1970 Chevy Pickup:

Wire Color Description
Black Ground
Green Switched Power
Orange High Speed
Yellow Medium Speed
Purple Low Speed

The black wire is the ground wire, and it should be attached to the metal frame of the blower motor. The green wire provides switched power to the blower motor, and it should be connected to a source of switched power, such as the ignition switch. The orange wire is for high speed, yellow wire for medium speed, and purple wire for low speed. These wires should be connected to the corresponding speed terminals on the blower motor resistor.

It is important to note that the blower motor resistor is responsible for controlling the speed of the blower motor. If the resistor fails, the blower motor may only work on one speed or not at all. If you are experiencing problems with your blower motor, it is a good idea to check the resistor before replacing the motor.


How do I know if my blower motor is failing?

If you notice that the air coming out of your vents is weaker than usual or if the blower motor is making unusual noises, it may be an indication that the motor is failing. You can also use a multimeter to test the voltage at the blower motor. If you are not getting any voltage, it may be a sign that the motor has failed.

How do I troubleshoot a failing blower motor?

First, check the wiring to the blower motor to ensure that there are no frayed or damaged wires. If the wiring is intact, you can try tapping on the blower motor with a mallet to see if that restores functionality. If tapping does not work, you should test the voltage at the blower motor to determine if it is receiving power. If it is not receiving power, you may have a problem with the blower motor resistor or the switch. If the motor is receiving power, but it is not working, it may be time to replace the motor.

What can I do to prevent my blower motor from failing?

One of the best things you can do to prevent blower motor failure is to regularly inspect the wiring to ensure that there are no frayed or damaged wires. You should also check the blower motor filter to ensure that it is clean and free of debris. Additionally, you may want to consider replacing the blower motor resistor every few years to ensure that it is functioning properly.

Can I replace the blower motor myself?

Replacing the blower motor can be a challenging task, especially if you are not familiar with automotive electrical systems. It is recommended that you seek the assistance of a professional mechanic if you are not comfortable with this type of work. However, if you have experience working with automotive electrical systems, you may be able to replace the motor yourself. You will need to purchase a replacement motor and ensure that you have the necessary tools to complete the job.

How much does it cost to replace a blower motor?

The cost of replacing a blower motor can vary depending on the make and model of the vehicle and the location of the repair shop. On average, you can expect to pay between $300 and $500 for parts and labor. However, if you opt to replace the motor yourself, you can save on labor costs and only pay for the cost of the replacement motor.

In conclusion, having a fully functional blower motor is essential to keeping your 1970 Chevy Pickup comfortable. By understanding the wiring diagram and following the tips provided in this article, you can troubleshoot any problems you may have and keep your blower motor running smoothly. Remember to always exercise caution when working with automotive electrical systems and seek the assistance of a professional mechanic if you are not comfortable with the work.