1999 Ford Mustang mileage: 106,000. The other day my car stopped dead in the middle of the road. The computer gives me the 542 code. According to my repair manual, that means Fuel pump secondary circuit failure: ECM to ground motor. Now, I have no idea what that means.I'm trying to located the fuel pump relay switch to test it. The fuel pump, filter, and spark plugs have all passed their test. However, the manual doesn't mention the location of the relay. Where is the fuel pump relay located in a 91-2.3L Mustang?
have the same problem?
Thursday, February 10th, 2011 AT 7:57 PM