2007 Chevy Colorado blower fan resistor and wiring harness replacement

[DTomlinsonpiano]

The other way is to eliminate the connections. If you can solder, you remove the resistor and cut away the plastic with a hot knife. Clean the terminals and solder short peices of wire to the terminals. Use automotive butt connectors to splice the wires (crimping the wire ends with the butt connectors). This makes a more solid connection and oxidation cannot occur.

Dennis (licensed mechanic for over 40 years, specialty field electronics and electrical issues).

[DTomlinsonpiano]

The problem with the connector is fairly high amperage going through the terminals with not enough surface area. This causes the terminal to heat up and make what is called "oxidation", similar to corrosion but different. More oxidation causes more heat so excertra it fails. It is very important to reinstall the new connector with silicone grease as this helps prevent oxidation. Apply the grease to both the plug and terminals.

[eelectromagnetic]

Good information. I have a 07 Colorado with the same problem and including the burnt pin #2 on the plug and socket for the resister. Going to replace all including the blower fan.

Thanks

[eelectromagnetic]

@eelectromagnetic

[jav280zx]

Great video! I just did this the other night. Everything is working fine for now.

[schmoderboat66]

thanks for the video!! im doing this today. but also replacing the blower motor itself. iv been informed by numerous colorado owners with this problem, and other chevy owners. that the reason for the short is actually originating in the blower.

[CompTechMike]

@schmoderboat66 - most of what I researched indicated that the problem was caused by a loose connection between that 4-wire connector and the resistor. It would wiggle, just ever so slightly, and cause the current to arc out and destroy the connector. But you're right - there can be other causes, including the blower motor. If just replacing the cable and the resistor doesn't work for you, or if it continues to go bad again, possibly replacing the motor will solve this.

[CompTechMike]

@schmoderboat66 - also, if your blower fan doesn't turn on at all, try replacing the fan, or testing it at that grounding block that I mention at the end of the video. So far it's been a month since I replaced my cable & resistor, and all's been working fine! -fingers crossed- ;-)