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ac/heat blower motor problem

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Old 02-03-14, 04:51 AM   #1
oldManTan
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Default ac/heat blower motor problem

Hey guys, I have a 92 Sc400 and the heart doesn't blow. the controls and everything works just the air doesn't blow. So I'm guessing it's the blower motor or the resistor. You guys know how I could check? It can't be the relay because the head lights still work. Which ever is the problem is it hard to change either?
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Old 02-03-14, 09:30 AM   #2
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welcome to CL, please post in the proper sub forum.
your radiator level is a little low and it stops the heat from working.
get some coolant like the kind in your car (See color in reservoir) and add more of it to top it off when the motor is cold. the red stuff is toyota brand, if its green or the yellow stuff you can get that at the auto parts store.

you can add distilled water in a pinch, but if you live where it gets below freezing and you leave your car outside the more water in there the more likely it will freeze and that can cause damage, so its better to use the real coolant or pre-mixed stuff.
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Old 02-03-14, 11:33 AM   #3
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ok, ill check that tonight
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Old 02-03-14, 12:24 PM   #4
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let us know how it goes, that is probably the problem it happens on sc400's all the time, if they are even a little low on coolant you loose the heat.
there are a few other things it could be though but lets go through them one by one, first step is top off cooling system and keep an eye out for leaks. if you know how to remove the air from the system or can get a friend to help, do that as well while/after filling.
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Old 02-03-14, 01:22 PM   #5
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but the AC doesn't blow either? and the radiator was changed before i got the car, and i think it's topped off. i'll check though just to make sure.
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Old 02-04-14, 09:18 AM   #6
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oh I thought you meant it was blowing air just the heat that wasn't working as in it is cold.
IF its not blowing out air at all then yes that is a different problem not the coolant.
I would check all the fuses first, in the bay and underneath by your left foot under the steering column area.
also check the cigarette lighter for pennys that may have fallen in and shorted the accessory circuit.
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Old 02-04-14, 09:36 PM   #7
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Cool, at least we're on the same page now lol. So I'll check the fuses tmr and we'll see where we're at then. Already found a blower motor on eBay for 40 bucks free shipping if it comes to that.
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Old 02-05-14, 06:27 PM   #8
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Fuses r all good. I was trying to get the flasher out to take a look at it, with no success. Decided to search for the blower motor, also no success. Where the hell is everything in this car lol?
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Old 02-05-14, 08:13 PM   #9
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Radiator all full, still no heat. ac doesn't work either. Just checked the other steps you suggested anyways. So should I buy the blower?
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Old 02-05-14, 08:59 PM   #10
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its under the passenger side of the dash somewhere, not sure how much stuff you have to remove to get to it.
here is a thread I searched for and found, do a search for blower motor
http://www.clublexus.com/forums/sc-4...d-working.html

There is also a resistor for it that could be bad, not sure if it has a relay.
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Old 02-08-14, 11:54 PM   #11
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gonna look where it's at tomorrow. looking for a thread right now to see if i can find where the motor is at.
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Old 02-09-14, 01:54 PM   #12
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Ight so I got the motor out and it works with a battery! Which means there's something else wrong, don't knife what. Guys have any idea what else I can Check?
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Old 02-09-14, 05:16 PM   #13
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Ok so trying to get the resistor out, there's a wire that's clipped to one of the two plugs and I can't disconnect the plug to get a closer look at the resistor itself. This is pissing me off beyond rainbow road. How in the hell is a little plastic plug stuck in there so hard! I have no idea what to do. I might go to the dealership one day if I can't get this figured out today. Anyone have any tips for the small plug with the two black and yellow wires?
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Old 02-09-14, 06:49 PM   #14
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ok got the resistor out, can't find anything wrong with besides the fact that its backside is covered in who knows what. like salty dirt or some thing. anyone know of a thread on how to fix the resistor? like something to solder or rewire? cz this thing is pretty simple it seems.

here's the piece as a whole and the inside of it
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Old 02-11-14, 10:08 PM   #15
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anyone have any clue?
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Old 02-11-14, 10:08 PM
 
 
 
 
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ac, bad, blower, controller, gs300, lexus, motor, sc

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