Ford Mustang Forums banner

1964 1/2 heater motor issue

5K views 33 replies 3 participants last post by  indy2000 
#1 ·
After 30 years I tracked down the car I had in high school and am now restoring it. The latest issue is the heater blower motor. Someone had replaced the original 3 wire motor with a 2 wire. It did work, but of course only had one speed. I pulled the heater box, replaced the core, put in the correct 3 wire motor from C J Pony, resealed the case, and reinstalled. When I tried it, it blew the fuse. Thinking maybe I had a clearance issue with the squirrel cage, I pulled it back out. It's fine, no clearance issues. I had tested the motor on the bench with a battery before I put it in the car, and it worked fine on both low and high speeds. After mounting it back in the car, but before I connected the wiring, I put in a new fuse and checked for 12 volts at the firewall red and orange connectors. With the blower switch on low I got 12 volts on one wire, and with the switch on high I got 12 volts on the other wire. So I reconnected the wires and tried it again. Blew the fuse. Next I went back to basics. With the heater box still in the car, I eliminated everything and used jumper wires to go directly from the motor to the battery. Black wire to negative, red or orange to positive. Nothing. Then I got a second battery, set it on the fender, hooked it up the same way. Motor runs fine on both low and high speeds. After scratching my head, I went back to the car battery, and yes the car does start and run fine with that battery. I disconnected the positive battery lead and tried the jumpers again. Nothing. I put the positive lead back on and disconnected the negative lead. Motor runs fine on low and high speeds. What's going on?
 
See less See more
#27 ·
And just like that 30 minutes after reading your post that made me go back and look at that new motor,....my problem is solved. Although I had thought about it before, I got sidetracked by someone else's bad information. All I had to do was get yet another motor and try it. Works fine. As I had already stated, my wiring was good with no shorts. I was just too willing to accept that the new motor was good because it was new. And I knew better! I run into that in other applications.

Thank you vertvert!!
 
#30 ·
I deal with your type all the time

Facts

the 2 wire motor is 2 SPEEDS

the 3 wire motor is 2 SPEEDS

the switch's and its flow of power, ground or power side switched, are different

someone, maybe, used a 2 wire motor with a appropriate switch, and appropriate path of power.......made a 2 motor work in an original 3 wire setup.....if there was only one speed, you diagnosed it wrongly, a resistor may have been open

never the less, you came in and swapped motors, without that consideration, hence the ground was in the wrong spot

I offered a chance for you to be able to diagnose it, but you rather change a part that you had installed incorrectly.

so now come clean, you got another 3 wire motor, what else did you do to make it work?

cause I know, if you installed the second motor the same as the first, without a rewire, you would have the same outcome, motor no worky.

???
 
#31 ·
You may bluff your way past others, but it's obvious you're one of those folks who like to hear themselves talk, and want everyone to think you're smarter than you really are. The facts are that someone else installed the wrong motor in this car probably because it simply fit or they just didn't know any better. The switch is stock and correct for this car. I just put it back original with the correct type motor. It was just defective. I found another correct but old 3 wire motor to try and it worked perfectly. I will get another new motor and that job will be complete. There is now and never was a short.

I'm out. Good luck.
 
#32 ·
the magical blown fuse.............HAHA

the first in history, to blow a fuse without a short and functional load.....please tell the secret???

the first motor is was not defective, you proved it yourself POST#1, straight to battery power, or was that a lie??

mint, thought you run out, when called out
 
#33 ·
mint, thought you run out, when called out
Wasn't it you who ran out first? Didn't you leave this guy hanging because he didn't address you as "your highness"?

Listen Indy it's quite obvious you have tons of troubleshooting experience. It is also clear you are some type of bitter that you don't get the recognition you feel you deserve. Trust me, I read everyone of your posts. Without your technical additions, this forum would be much less interesting. However you need to work on your people skills.

It would be a double edged sword to have someone like you working for me. I'd like the service but I wouldn't let you anywhere near the customers.

Sort of like sloth from goonies, hidden in the basement but brought out for the muscle. Then quickly shuffled back into the shadows.

Maybe you have a daddy issue. You prob would make a better run away stripper as they act just like you.
 
#34 ·
Okay, Dr.PHIL

Hey yOU...........Guuuuuuuuuuuuyyssssss!

Love that movie.

As far as your opinion, its nice to have one.

And as far as me being out........it was regarding any elec help, as the poster clearly had it under control

back to the topic.

and now that, a new motor was the 'fix',

one must question that validity, anybody finding this post trying to do the same will run into the wall again and again without this thread corrected.

This motor problem is very common, due to wiring and control differences in from 64.5 to 65

A little work in finding the elec diagrams, and following the circuit design would see that.

so wait for jim427's.....response.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top