Had my axle seals replaced a week or two ago. Kept watch on axle and had no more leak. Today I started up my car, and the abs and traction control lights are staying on. My wireing is in tact.
Check your brake fluid level. Make sure it is full. You may also need to have your brakes done. I think the light will trip if the pads get low. If they get really worn, it will drop the fluid level in your reservoir.
Should be a code stored in the computer that will indicate a place to start looking. It may or may not be related to the work. Let the facility that did the axle seals check the code before going too far, they should have no problem doing that for you.
Search Ford Mustang Questions
Ford Mustang Experts
Related Models For Sale
Used Cars For Sale