Keep your heater and A/C fan stepping through its speed settings with the Standard Ignition RU-257 Blower Motor Resistor, built as a direct-fit replacement for the 1986-1987 Toyota Corolla, 1987-1990 Toyota Tercel and 1986-1988 Chevrolet Nova. This HVAC blower motor resistor sets the blower motor's speed steps by routing current through different resistance values, so the fan can run at more than one speed.
Signs the resistor may need replacing include a blower that works only on certain settings, such as the highest one, or no longer changes speed. A blower motor, switch or wiring fault can cause similar symptoms, so diagnose the cause before replacing. See the Buyer's Guide tab for engine details and the full fitment chart.
Interchange: RU957 · JA1304 · BR167 · 1468104390 · 8713812110
This part cross-references / interchanges with the following part numbers:
What does a blower motor resistor do?
It sets the blower motor's speed steps by placing different resistance values in the circuit, letting the heater and A/C fan run at more than one speed.
Is this the right blower motor resistor for a 1986-1987 Toyota Corolla?
Yes. The RU-257 is a direct-fit replacement for the 1986-1987 Toyota Corolla. See the Buyer's Guide tab for engine details.
Which other vehicles does the RU-257 fit?
It also fits the 1987-1990 Toyota Tercel and 1986-1988 Chevrolet Nova. The Buyer's Guide tab has the full fitment chart.
What are signs of a failing blower motor resistor?
A blower that runs only on certain settings or won't change speed may point to the resistor. A switch, motor or wiring fault can act the same way, so diagnose the cause first.
How is the RU-257 installed?
Disconnect the battery, unplug the connector, remove the old resistor and fit the RU-257 in its place. Follow the vehicle service information for its location and procedure.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
