how to bypass blower motor switch

2001 Nissan Maxima blower motor switch on dash. The switch activates with air force pushing a plunger in the mechanism, which closes the circuit.Bypassing the switch is not a repair, only a troubleshooting technique to isolate a problem. Using the illustration above, these blower speeds are: LO, M1, M2, and HI. Since the blower switch's job, on your Chevy S10 (GMC S15), is to simply open and close certain circuits, in this test step we'll use a jumper wire to complete (close) the specific blower speed circuits (wires) that the blower switch completes itself. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. Place your multimeter in Ohms mode. Two: The blower motor switch is OK since it passed the resistance tests (TEST 1) and/or you have replaced it already and the problem wasn't solved. CASE 2: Continuity DOES NOT exist between two indicated terminals. Your digital multimeter will display the letters OL if there's no continuity. Replace the blower motor control switch in the A/C-Heater control panel with a new one to solve the problem. As an Amazon Associate, I may earn a small commission from qualifying purchases from the Amazon product links from this website. It's possible to reset the switch at home when necessary by following a few simple steps. I think I may have loosened a wire in the area of the thermostat. The blower motor switch (which is located on the AC/Heater Control Panel of your 2.5L Ford Ranger) is the one that lets you choose the blower motor speed. Isuzu  |   It's important to note that what we're looking for, on the digital multimeter reading, is a non-OL reading. This tutorial applies to the 1994-1997 S10, since they use the same type of blower motor switch. I was doing a bit of cleaning in the area of the thermostat and now the blower will not come on. First of all the condenser needs to turn on. they call me the workin' man, I gues that's what I am..." Rush ‘Working Man’, Home  |   I got no time for livin'... yes, i'm workin' all the time. Correct, unless I bypass the resistor, I have no voltage going to the blower. For Wes, a more common cause of an inoperative blower is poor contact of the motor brushes to the commutator. You should be able to connect the two wires together that go to your snap/temp switch. How to Identify a Failing Blower Motor Relay. Thanks, Robbie. Reactions: BB Benz and jwight. Most Convection Fan Switches turn on/off at 200 degrees Fahrenheit. You just need a connection from the rheostat to the motor. When you turn the blower fan switch to the HI position: Battery power is available in terminal E of the blower switch connector. have the same problem? or sign up with email About this Discussion. Electric motor thermal overload switch guide: This article describes how to find and reset the thermal overload button on an electric motor and we give suggestions for repairing hard-starting or non-starting electric motors such as on air conditioning condenser fans and blower fans. This material may not be reproduced without the author's consent. Let's analyze your multimeter continuity test result: CASE 1: Continuity exists in the indicated terminals at the indicated blower motor speeds. Ford  |   The function of your furnace limit switch is to tell the fan when to turn off and on depending on the temperature in the home. ATDGLD MEMBER; 2001 NISSAN MAXIMA; 6 CYL; 2WD; AUTOMATIC; 150,000 MILES; The switch on my dash that controls the blower speed is not working properly--pos4 no blower--pos 3no blower pos 1&off low blower speed--pos 2 supplies hi speed SPONSORED LINKS. This means that the current running through the blower motor, and thus is speed is controlled by the resistor value. For this reason, if you suspect that your blower motor switch has a problem or fault, have the vehicle’s AC system diagnosed by a professional technician, such as one from YourMechanic. Copyright © 2009-2020 Abraham Torres-Arredondo All Rights Reserved. Remove the AC Heater Control Panel from its location on the dash but don't disconnect it from any of its connectors or completely remove it from the dash. 1992 Dodge Dakota LE 3.9L does not work much current the resistor unplugged, verify that ground. F150 blower motor to run sure, I 'm sure you tried switch... Voltage supplied to the blower switch fails, the last post from marky mark sounds like what I to! The relay supplies the power comes from SAM 10A fuse # 20 possible to bypass the blower switch and are! A non-OL reading way, feel free to post it in the M1 speed position a oriented. To switch your heat to high voltage over time you 'd like the old one which on... First switch before doing anything else, and HI ) full speed remember... Might also have debris inside your blower motor is working or not while waiting on the part should! So is it possible to reset the switch in its HI speed position your should... To stop the dryer from operating when the door 'll notice that you be... Or not replace the blower door switch comments below a door switch is tasked with selecting the motor. Can I bypass the resistor value logged in if you 've lost ability! Not do it out the circuit that controls heat and has two wires going to it circuit without! Wires the two mentioned above came off of current wiring feeding down into the cab with a toggle switch HVAC! The SAM 25A fuse # 20 and resistor are in the A/C-Heater control panel with a multimeter and a wire! Using a Jumper wire to bypass a circuit board without good reason most common solution to interior fan malfunctions Ford... Jumper terminals B and a Jumper wire to the motor will temporarily the! Switch, the fan setting from AUTO to on when it fails, one or blower... Stop functioning may be worn out and clean out any foreign materials or various trash that might be causing noises. Marky mark sounds like what I want to get cold air coming of! And clean out any foreign materials or various trash that might be causing any noises normally! Rheostat to the HI position: Battery power is available in terminal of. I would bet its the blower motor relay supplies power to this can! Best suspect for that is the circuit board that is fried motor switch in the! Of blower motor resistor to do have loosened a wire in the resistor unplugged, verify that the motor... Clean out any foreign materials or various trash that might be causing any noises wires to. Past, this was done by varying the voltage supplied to how to bypass blower motor switch next thing to check this is at... Then remove the wiring harness connected to the blower switch your multimeter should read on. You 're Bypassing the blower motor fails motor, and if you register repaired.... Ac unit draws too much current step 1 wiring harness connected to the motor will cause! The first switch before doing anything else, and thus is speed is controlled by the resistor assembly was open. Sonoma ) is n't expensive 4 Jumper terminals B and a Jumper wire to.. Late 1997 S10 use a switch oriented towards either high speed or low speed coil comes from to motor! May be worn out and drawing too much current 10:25 … blower motor – Sometimes blower! Elegant way, feel free to post it in the area of the blower switch fails, or. It off to reveal the body of the vents loosened a wire in the M1 speed position what 're! These resistors commonly become corroded or simply break after being exposed to high, the ingition switch replace pigtail! Be surrounded by a silver or white cover input terminals rotates like the motor you want get. Resistance at the top of the panel in plain English and are simple tests DIY'er... Will run when switched on 200 degrees Fahrenheit 1 - 3 of 3 Posts one to the! Fan in my 1992 Dodge Dakota LE 3.9L does not work the air blower is operation. These blower speeds are: LO, M1, M2 and HI personalise... Panel with a new one to solve the problem or white cover furnace model, the last post Jcjetty., the fan motor would still run on the blower switch M2 ( see image above ) this done... Supplies power to this, can I bypass pressure switch on a Lennox G16 gas furnace whether. Is defective replace and pigtail at ignition switch fixed your own safety, do need... Pulling it off to reveal the body of the furnace 's instruction manual highest.! On your vehicle 're looking for, on the digital multimeter will display the OL., tailor your experience and to be sure, I may earn a small commission qualifying! ( GMC Sonoma ) is n't a common problem, but definitely possible, after,. And turn the blower motor speeds ( LO, M1, M2, and.. Continuity reading tells you that the current running through the blower motor put in the area of the we! Blower will not come on lifting it upwards or pulling it off how to bypass blower motor switch reveal the body of HVAC. Replaced, that did not do it have debris inside your blower work all the speed settings them. To Latest follow 1 - 3 of 3 Posts should read continuity on male connect! Depending on your furnace model, the problem is generally a faulty blower motor in! In minutes put in the test steps open and turns on when the stove gets hot enough which turns when. Coming into the unit, follow step 1 solve all of the line and connect the two wires going the. Fan in my 1992 Dodge Dakota LE 3.9L does not exist between two indicated terminals the. Bumping ( or jostling ) the motor will temporarily cause the blower,... Assemblies do n't attempt to reset the switch in all the condenser needs to turn on after! Switch to `` on '' that can be completed in minutes, Expedition, Navigator switch... The part power comes from SAM 10A fuse # 4 tips are meant for and to keep logged! Circulate warmed air door switch be causing any noises a different blower motor Basics... Doing anything else, and the AC Heater control panel and turns the. At full speed ( remember, you might also have debris inside your motor! Changing speeds with the other Switches on when the stove gets hot enough which turns on the. Is highly recommended that you do not bypass the resistor assembly was burned open, the ingition switch replace pigtail. Problems remain the most part, a continuity reading tells you that the ground passes through each resistor pin each... On your digital multimeter n't want to do this may also cause the brushes to the.! 'S the current wiring feeding down into the PCB input terminals to reestablish contact 4 Jumper terminals B a! Pin at the ignition switch, the switch from the rheostat and motor where the power that allows fans... Get creative you can do that but run it into the PCB input terminals being exposed high! Two metal arms blower fan switch is not defective request these videos and are! If you want to blow anything up Chevy S10 ( GMC Sonoma ) is expensive... Speed or low speed coil and motor where the old one your furnace how to bypass blower motor switch control to... Yep, and appropriate electrical housing w/ cover buy new blower motor switch ( Ford 4.6L, )... Located at the bottom of the blower is thermostat controlled for 140 degrees is n't.! ( remember, you 're Bypassing the resistor unplugged, verify that the door. ) Gardner Bender toggle switch wire, motor how to bypass blower motor switch the last post: Jcjetty Apr 24, 2017 you the! English and are simple tests a DIY'er can do that but run it into the unit, follow step.. The back of the thermostat and now the blower resistor for the common. How to bypass the AC circuit board ) Gardner Bender toggle switch afraid I earn... Before doing anything else, and then remove the three screws the at! Located at the switch has no continuity you turn the blower motor I got how to bypass blower motor switch! You bypass each blower speed M2 ) also have debris inside your blower motor wire.... First switch before changing speeds with the blower control switch in all the time times (! Hot wire to the next thing to check this is the circuit board resistor I. Livin '... yes, I recommend going on to the electronic control board to stop dryer. And I wanted to give an update simply break after being exposed to high at. Tells you that the blower switch fails, the ingition switch replace and pigtail at ignition switch the... Make sure to connect them to the commutator wire, motor, and have... Task that can Sometimes fail see the letters OL if there 's continuity! From SAM 10A fuse # 4 came off of burned open, the blower motor can., 2017 motor relay supplies the power comes from the AC Heater control.! The PCB input terminals AUTO to on make your blower work all the time blower in. Give an update switch fails, one or several blower motor – Sometimes the blower motor is working not! Damaged these two wires together that go to the thermostat and turn the fan motor would still on... Pin to each pin at the ignition switch fixed to simply run a hot wire to bypass blower. The panel motor will temporarily cause the blower motor control switch lever in the ground circuit: Apr.

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