Standard Ignition HVAC Blower Motor Resistor P/N:RU-504
Keep every blower-fan speed working with the Standard Ignition Blower Motor Resistor RU-299. This resistor manages the current sent to the HVAC blower motor so it can run at each of its lower fan settings, and it drops in as a direct-fit replacement for the 1985 Toyota Cressida. When a failed resistor is the cause of losing your low and mid blower speeds, this part replaces it.
Precise resistance: premium copper electrical connectors help deliver more accurate resistance values for consistent resistor performance and longer part life.
HVAC-matched design: developed to integrate cleanly with the vehicle's HVAC system for the listed application.
Speed control: intended to restore variable-speed control of the A/C and heater blower motor, helping support HVAC performance and passenger comfort.
Toyota-specific: specifically designed for Toyota applications and tested at the facility to confirm correct performance across operating conditions.
Signs the resistor may need replacing include a blower that only works on its highest speed or drops out on the lower settings. Diagnose the cause before replacing, as wiring or the switch can produce similar symptoms.
Interchange: RU999 · JA1366 · BR209 · 8863532010
This part cross-references / interchanges with the following part numbers:
What vehicle does the RU-299 fit?
It is a direct-fit blower motor resistor for the 1985 Toyota Cressida. See the Buyer's Guide tab to confirm fitment for your vehicle.
What does a blower motor resistor do?
It manages the current sent to the HVAC blower motor, allowing the fan to run at its lower and mid speed settings instead of only high.
Why does my blower only run on high speed?
A failed resistor commonly causes the loss of low and mid speeds. If the resistor is the cause, this part replaces it, but wiring or the switch can produce similar symptoms.
What are the connectors made of?
It uses premium copper electrical connectors, which help deliver more precise resistance values for consistent performance and longer part life.
What other part numbers does it replace?
It interchanges with RU999, JA1366, BR209, and 8863532010.
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.