Having problems with your 2003 Mercury Grand Marquis ?
Abs and antiskid lights both stays on - 2003 Mercury Grand Marquis
My bet is you have a bad wheelspeed sensor (its a part that both systems use). A code scanner should be able to tell you which one is bad and you can have it replaced.
Repair Help & Product Troubleshooting for 2003 Mercury Grand Marquis
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