Blower motor suggestions '77 280

[MEZZZ]

I have done alot of searching and could use some help on my car. I cannot get the blower to come on. I've read alot of post about 240's but cant find anything on later models. I pulled off the access panel in the passenger footwell to expose the blower motor and removed the center console as well because I am replacing the stereo.

I see a white and blue connector going to the motor of the blower. I was thinking a good place to start is to hook some current up to it and see if I can get it to spin. I have a 12v converter I bought over the weekend to test the clock and it is a 500mA, dont know if thats enough to do anything. WHen I connect it, the motor hums but doesnt spin. Can I take a couple leads directly off the battery? I am obviously a novice to all of this and would appreciate any help you guys can shed.

I looked for an inline fuse but didnt see one. I did find the inline fuse for the non working stereo, an old cassette deck and it was blown. I'll take my time installing the new just to make sure everything is grounded properly. I did trace the power line going to the radio all the way over to where the P.O. spliced in above the fuse box. I found the same color blue wire as the blower hanging right next to the splice for the radio. I figured if I start with the motor to make sure it is spinning and work backwards, thats a good place to start. Thanks

[Walter Moore]

On my 71 there was an inline fuse for the fan, and I think that it was a 10 amp fuse. On my car it was blown, which I suspect had to do with the fact that someone had used that circuit for the air conditioner clutch.

In any event 500ma isn't going to be enough to make the fan spin.

[MEZZZ]

Thanks Walter, I didnt think it would be enough juice to make it turn. Best I could do was a slight hum

I will attempt to run some other type of power over to it.. I'll look again for an inline fuse as well.

thanks!

[MEZZZ]

Well, I got some leads tonight and ran them directly from the battery to the blower motor and it cranked right up. Now, what can I do from this point? I CANNOT find an inline fuse! I have a '77, I can see the wires coming off the switch, they break at one point, then a white and blue wire going to the blower motor. I dont see an inline anywhere in between the switch and the motor.

Is there an inline on a '77? I have searched this subject and found alot of threads on earlier models. I also looked in the Haynes manual with no luck.

Thanks for any light someone can shed on this for me.

[Sailor Bob]

There a good schematic in the service manual - I am having a time trying to copy it to this site, it is adobe (if anyone can describe how to do that).

Should be a black and a white coming off the plug from the 20A fuse/grd to the switch and the motor (respectively), from the switch there are three wires to the (four pin) plug which goes to the resistor that feeds the blue wire to the motor. You should end up with a blue and a white going to the (two pin) plug to the motor.

Don't know if that clarifies anything.

I highly recommend buying the service manual on cd - costs $10, worth lots.

[sblake01]

You can download it here for free:

http://carfiche.com/manuals022/cars/

[MEZZZ]

You can download it here for free:

http://carfiche.com/manuals022/cars/

Thanks Sailor BoB/SBlake, I will check it out. I appreciate the help.

[TBK1]

here is the wiring diagram ( it it uploads)

F77ZCAR-WIRING1.pdf

[Sailor Bob]

Just saved ten bucks!

[MEZZZ]

Just saved ten bucks!

After getting screwed on this car when I bought it...I need to save $10

Thanks TBK1, Sblake for the links! And Sailor Bob for your great sense of humor