What is the difference between F7AU-17504-AA and F5AU-17504-AB wiper motors?

 

The F5AU-17504-AB is the factory-installed wiper motor for the '95 model year.
The F7AU-17504-AA is a later version of the same part.
Either one should fit and function in your '95 G. M.
If you have a choice, get the newer design -- F7AU-17504-AA

 

Thanks so much for info. Pulled both from auto salvage. Hoping to fix wipers that do not park. Wipers work but stand straight up when turned off.
Thanks again. Mike

 

Yo, Mike !!
About those wipers --
There is a KEY in the shaft that drives the wiper arm. The keys fall out almost every time a wiper is removed from the motor shaft.
Without the key, the wipers CANNOT lock into their correct position, relative to the position of the wipers when "parked".
After dealing with the nightmare of lost wiper-shaft keys on a '92 Crown Vic and a '95 Merc, I came across the perfect solution.
Replace the wiper arms with DORMAN Wiper Arms, which are made with a PERMANENT key that's molded into the wiper arm.
It CAN'T get lost, and wiper installation/removal is quick and easy.
Part Numbers = Left - Dorman #42619
Right- Dorman #42618
I got both DORMAN wiper arms from Amazon.com -- good price, fast delivery. Also available at Pep Boys.
Google the Dorman part numbers for the best price in your area.
Here's a copy of my Amazon Product Review:

By on February 21, 2013
The Dorman Wiper Arms are a PERFECT FIT replacement for my old, worn-out, original eqipment wiper arms -- but with a great new feature !!
The new design feature of the Dorman arms have a cast-in Locating Pin that replaces the factory original floating Locator Pin that would roll over, fall out, and/or get lost in the mud or snow, depending on the season.
The Dorman's cast-in Locator Pin does away with the normal cursing and screaming that's associated with wiper-arm replacement on the big FoMoCo sedans. Now, it's quick and easy -- and WAAAYY less expensive than a replacement from the Dealer !!
The wiper arms come with a BLACK semi-gloss, powder-coated finish that lasts long, looks sharp, and eliminates annoying glare.
Teamed with a new pair of BOSCH *ICON* wiper blades (also available at Amazon), the new arm/blade combination wipes cleaner and clearer than the factory original wipers ever did !!
My order arrived on time, with box undamaged and all items in perfect condition. Thanks, Amazon !!