Final Stage Resistor (final stage unit), blower motor resistor ; Fuse F76 = 40A, Heater blower (yellow) [cn90 says it should have 12V when HVAC is turned on][QSilver7 says the heater blower controls the air velocity for the cabin/interior HVAC system.] Fuse F46 = 15A, Blower relay/Parked Car ventilation/Receiver, parked car ventilation BMW Blowre Motor Resistor Replace. This video is a how to replace the blower motor resistor on a 2001 BMW 330i. This procedure works for most BMW series with Is fuse 20 blowing? It might be your blower motor. Watch to see how to replace your blower motor. Thanks for watching. Blower Motor is an ACM from Pelican Pa Step 1. Locate the fuse for the blower motor in the owners/service manual. Test the fuse, with the ignition key on, using the 12-volt test light. Attach the clip lead of the test light to a good ground like a bolt screwed into metal, and touch the sharp probe end to the terminals on the fuse. An indication of power at both terminals of the fuse Where To Buy The Blower Resistor And Save. TEST 1: Checking The Blower Resistor's Resistances. TEST 2: Verifying Blower Speed Switch Voltage Inputs. TEST 3: Using A Jumper Wire To Bypass The Blower Resistor. More 2.8L Chevy S10 Pickup, GMC S15 Pickup, And GMC Sonoma Tutorials. 2. Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. 1 (855) 347-2779 · hi@yourmechanic.com. Read FAQ. GET A QUOTE. Toyota Tundra Car Heater Blower Motor Resistor Replacement costs starting from $140. The parts and labor required for this service are Air on the Side of Caution. One of the first signs of blower motor failure is weak airflow. The motor wears out over time, and can’t push as much air, leaving you wondering what happened to the air power. This also decreases the efficiency of the defroster, as it uses the same fan. You might also notice the air blowing at certain speeds, but It is not likely a final stage resistor bank, vulgarly known as a porcupine for the heat sink quills. You have been sold a Pig in a Poke. The FSR porcupine is located on the blower assemby with the heat sink in the air stream for cooling. The Final Stage Unit N2 is on the blower assembly. MSRP Price: 87.00. BW Part #: 64116912633. Brand: Genuine BMW. (In Stock) Description. Customer Reviews. Blower fan problems in your BMW E30, Z3, and Z8 are likely caused by a faulty blower motor resistor, also known as a blower regulator, final stage resistor (FSR) or final stage unit (FSU). It regulates the fan speed coming from the blower motor. U35xm.