Hey guys. My blower motor wouldn't turn on one day, so I figured I'd replace it... Well, six months later, when winter hits and I finally give in to the cold, I did replace it. Problem is, the blower motor still doesn't turn on. I'm not sure what it is at this point, but here's what I've got so far:
1. The heater fuse has power.
2. The wire that goes into the blower motor has power.
3. The wires that control fan speed have power in only the high position when it's unplugged from the side nearest the blower motor, and when plugged in, have power in all wires regardless of fan switch position.
At this point, i'm guessing that it's the climate controls themself, but the buttons do make the air switch from recycle to vent, and changes position of the vents from upper vents to lower vents to windshield defogger, so those buttons do work. Could it be the fan speed switch itself inside the climate control housing? Or could it be that thing that the wire harness that comes from the fan speed switch is plugged into? I don't exactly know what it's called, but it looks like a black sort of "switch" with a spring "sensor" inside the blower motor housing and is labeled lo, m1, m2, hi. I'm assuming it's a resistor. Could that be the culprit? Anyone please help, I'm freezing my ass off here with no heat. Thanks again.

 

In my experience, when the resistor block goes, it's not all at once. You will lose one fan speed at a time (which corresponds to one resistor in the block), starting with the one that's used most often-- low speed. The next to go is almost always the next faster speed (what speed do you use if you want low but low doesn't work?).

You can do a google search with keywords like
"resistor block"
"blower motor"
"fan speed"
to get more info on this setup. It's not just Hondas which use it.

HTH, -scott

 

Hey bro. I had the same problem with my 88 Civic. I went to a junk yard and pulled a blower motor resistor from another car for five bucks...I was soooo glad that I did because that was the problem. If you open the glove box, check to the far right. There is a fuse looking wire going into a black box. The blower motor resistor is inside there. It kinda looks like a coiled thing with a sort of hexagon base. Change it and check it out. It was pretty cool doing just this one small thing and...BAM..it was fixed..
let me know what happens..
Danny G.

 

Cool, thanks for the help thus far everyone. Danny, I think that could be my problem. I actually have my blower motor ghetto rigged right now. I have the black power wire grounded to the body of the car, so the blower motor powers right up. I just hooked it to a switch so I can turn it off and on when I want. The only problem is that it blows on max speed all the time, so it's either hot as shit or colder than ice in my car!
I also checked the temperature controls while I had the whole climate control unit out, and damn! The two wires that control air mixing and temperature control are broken, so I have to manually pull the wire to change it to heat! So gotta fix that too.
I'm gonna try to find that little resistor over the weekend and post the results after installing. Thanks for the help again guys!