There is a great write-up on Mustang Evolution, with pictures, on how to replace the headlights on 1994-1998 Mustangs.
The article is located at http://www.mustangevolution.com/articles/200755/
Hope this is helpful to you.
pats module 1997 mustang location?
There is no 1997 5.0 mustang. Do you mean 4.6L or 3.8L
poo
how do u replace the lower ball joint on a 1997 ford mustang
Begin by removing the wiring harness from the back of your 1997 Pontiac Bonneville headlight. Remove the headlight assembly retaining bolts. Reverse the process to install your new headlight.
There are 4 screws located under the rubber on the edges of the headlight. These have to be removed in order to get the headlight out.
You replace the bulb the same as a 1998, which is answered further down the page.
Actually, it's located in the CCRM (constant control relay module) which is in behind the passenger front fender. It is a module with 5 relays (AC, Fuel pump, etc..). You can try to replace the relay ($10), the module used ($50-70) or buy brand new ccrm from Ford for $240. Your call. Get a wire diagram of the ccrm and replace the right relay if you go that route.
There are two metal clips behind the each headlight. Pull these upward, and the entire headlight will come out very easily. To replace the bulb, do so without touching the glass parts of the halogen bulb,and replace the headlight. Secure with the two clips. See, it was easy.
To replace the headlight bulb on a 1997 Mazda Miata, first, open the hood and locate the headlight assembly. Remove the rubber cover by pulling it off, then twist the bulb socket counterclockwise to release it. Carefully pull out the old bulb and insert the new one, making sure not to touch the glass with your fingers. Finally, reattach the bulb socket by twisting it clockwise, replace the rubber cover, and test the headlight to ensure it works.
The module is located behind the headlight switch on the drivers side of the car, it is black in every model from 93-97 while the 98's have a white one with keyless entry capability, it is on a bracket against the cruise control module which is silver. so, drivers side, in the dash, behind the headlight switch, just pop out the headlight switch and you'll see it.
if you just pull on it real hard it should just pop out