Power windows don't work

Help Support 7173Mustangs.com:

mpbsr

VIP Members
Joined
Mar 7, 2013
Messages
1,277
Reaction score
24
Location
New Jersey
My Car
1973 Mustang Convertible (Mach I Tribute)
Well I took the stang out today after another winter month of hibernation and decided to put down the drivers window...nothing. Hit the other 3 buttons and still nothing.

So I drove around for a 1/2 half and before putting her back in the garage hit the buttons again...nothing. When the car went in for its winter nap, all power windows were working properly.

Right now it's still to cold to try to figure out anything, but suggestions would be appreciated on where to start.

 

mrmach1

VIP Members
Joined
Apr 22, 2014
Messages
1,260
Reaction score
4
Location
Massachusetts
My Car
1972 Mustang Mach 1
I'd start at the fuse box. These old glass fuses have a habit of surprising us at just the wrong time.

 

Austin Vert

Benefactors
Joined
Jul 27, 2012
Messages
2,879
Reaction score
75
Location
Brisbane - Australia
My Car
1973 Mustang Convertible
Yeah, I'm no expert here, but if they were all working before winter, and now not, that points to a power supply prob. Check fuses, and power to all windows. Switches and motors all blowing out is unlikely.

Greg.:)

 

Don C

Fords Forever
Joined
Jan 1, 2012
Messages
7,927
Reaction score
699
Location
Springfield, OR
My Car
1971 Mustang Sportroof M code
mrmach1 is correct, the glass fuses are prone to corrosion, especially when setting over winter with high humidity, and then either reduce the voltage passing through them or fail.

The main power feed for the power windows comes from the battery via a circuit breaker, which is located near the solenoid and voltage regulator. To complicate things, there is also a "safety" relay the main power gets switched through to the window switches. The relay is powered by a lead from the fuse block and is fused.

It can be any one of these 3 things, or a loose or dirty connection.

 

mpbsr

VIP Members
Joined
Mar 7, 2013
Messages
1,277
Reaction score
24
Location
New Jersey
My Car
1973 Mustang Convertible (Mach I Tribute)
I'll try tomorrow to see if one of the fuses is blown.

Thanks

 

midlife

Shorts checker
Joined
Jan 24, 2012
Messages
4,009
Reaction score
406
Location
Tucson, AZ
My Car
No Mustangs at the moment.
I believe the power windows are powered from the diagonal buss-bar that is fused vertically.

 
Joined
Jan 7, 2015
Messages
8,032
Reaction score
481
Location
Western North Carolina
My Car
Multiple Mustangs!
I have a couple of power window cars and once I was working under the hood, there was a connection that I knocked loose. Seems like it was the driver's side behind the shock tower. This was in 1974 so memory not too good. I plugged the wire back and they worked.

David

 

72 Green Hornet 4sp

Active member
Joined
Oct 28, 2014
Messages
32
Reaction score
0
Location
Rockville
My Car
72 green/green CJ 4sp PW AC
I have a couple of power window cars and once I was working under the hood, there was a connection that I knocked loose. Seems like it was the driver's side behind the shock tower. This was in 1974 so memory not too good. I plugged the wire back and they worked.

David
I have a 72 mach 1 with power windows. It has been sitting for 30+ years in a garage. the front two go down/up really slowly and the back ones don't do anything. Does it need new motors since they have sat so long or would greasing the tracks work? Thanks

 

OMS

Vendors
Joined
Jul 22, 2010
Messages
4,559
Reaction score
150
Location
ohio
My Car
xxx
I have a couple of power window cars and once I was working under the hood, there was a connection that I knocked loose. Seems like it was the driver's side behind the shock tower. This was in 1974 so memory not too good. I plugged the wire back and they worked.

David
David is correct the main relay is on the drivers side shock tower



I have a couple of power window cars and once I was working under the hood, there was a connection that I knocked loose. Seems like it was the driver's side behind the shock tower. This was in 1974 so memory not too good. I plugged the wire back and they worked.

David
I have a 72 mach 1 with power windows. It has been sitting for 30+ years in a garage. the front two go down/up really slowly and the back ones don't do anything. Does it need new motors since they have sat so long or would greasing the tracks work? Thanks
Sense all are slow - is the battery good?

Fronts may need tracks cleaned and lubed

Rear usually is more involved - you need to open up the motors to clean and re-grease them

 
Last edited by a moderator:
Joined
Jan 7, 2015
Messages
8,032
Reaction score
481
Location
Western North Carolina
My Car
Multiple Mustangs!
Go on youtube and there is a great video by the Cougar guys on how to do a rebuilt or at least tune up on the rear motors. The front motors are available anywhere but the rears are getting scarce.

David

 
Top