For the 1999-2004 model year confirm fuses F2.21, F2.34, F2.5, and F2.37 are good and have power. 1999-2004 MY fuse panel schedule: https://www.allfordmustangs.com/foru...ml#post2669271
Check the ground behind the center console. It is shared by a number of devices including the radio, GEM, cluster, ODB2 port. It's frequently messed up during a radio install.
Follow the multiple black wires from the radio is one way to find the ground.
Another option is to test the ground wires at the cluster connector. Look for the black wires and the black wires with a white stripe. Again best to use a test light that will "load" the circuit.
Note, testing a ground with a VOM may work if the ground is open. However the VOM method want be able to tell a good ground from a "weak" ground. Again the best method is to use a test light that will apply a measured "load" to the circuit.
Or use the voltage drop method. Howto perform charging system voltage drop test https://www.stangnet.com/mustang-for...-drop-test.56/
2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.
Last edited by wmburns; 09-13-2019 at 12:11 PM.
Reason: Improve information in the post.