You replaced your blower motor on a Ford F 150 and the wiring harness was connected to another resistor switch What it r?

If you replaced your blower motor on a Ford F-150 and the wiring harness was connected to another resistor, it's likely that the blower motor resistor itself is the component that was connected to the harness. The blower motor resistor isn't a separate switch, but rather a component that controls the speed of the blower motor by providing different resistances to the electrical current. Therefore, "another resistor" in this context refers to a *replacement* blower motor resistor.

It's possible that:

* The old resistor was faulty: This is the most common reason. The old resistor may have failed, causing the blower to malfunction (e.g., only blowing on high speed or not at all), prompting the replacement.

* The new blower motor required a different resistor: While less likely, some aftermarket blower motors might have different resistance requirements than the original.

* Incorrect wiring: Although less probable if you successfully got the blower working, it's possible there was a slight misconnection during the replacement process. However, a misconnection would likely result in the blower not working at all or exhibiting erratic behavior.

In short, the "other resistor" is almost certainly the correct replacement part, the blower motor resistor. Double check your connections to ensure everything is properly wired.