03 Mustang convertible top will not go up. I filled motor reservoir and tried to work it, but it will not go up. Going down works ok?

 

You said lower is fine check both relays above terminal 85, 87 and 87A are on the same circuit. So you know what to check now?

 

If it stops working (going up) in a sudden, it sounds like electrical more than mechanical. And it takes only a few minutes to test the electrical.
1) Test if you get 12v to motor connector
Remove the motor connector, voltmeter red to red (circuit 903), black to yellow (circuit 902), key in run, parking brake engaged, have a 3rd hand and push the raise button, you should get, say 12.60V, then push the lower button, you get -12.60V. If both voltages are not exact, say raise with 12.55V, that's 0.05V voltage drop and not acceptable when you have poor wiring on the raise side but not the lower side. You will need to fix the wiring later on.
Of course if you get 0V you will need to investigate further at the raise relay. To begin, you can even borrow the lower relay.
2) Bench test the motor
Remove the motor connector, with the top lowered all the way, battery red -> red jumper wire -> terminal 1 of the motor, battery black -> black jumper wire -> terminal 2 of the motor
If the top doesn't raise, despite getting 12.60V, your motor is likely dead. To confirm, you will need to remove the motor completely and do a bench test, if the motor doesn't spin even without the 15LB added weight of the top, you know the motor is dead.

 

Wow, thanks for all of that information, will work on it today. Thanks

 

Quoted above from a new thread you started at: https://www.fordforum.com/forum/ford...ble-top-50562/
Not sure why you started a new thread.

Anyway, you will need to test the raise relay wiring as follows:
30 (circuit 903) - not needed (because your lower is working, this circuit connects to circuit 1205 to provide ground signal when lower is operating, in short, this circuit is also shared by the top motor)
85 (circuit 977) - key out, release parking brake, pull the relay, ohmmeter set to 200Ω, red to this terminal, black to battery ground post you may or may not get open loop (infinite resistance) or no continuity. Now set and have parking brake engaged, you expect to get non-zero 5ohm or less.
86 (circuit 588) - release parking brake, pull the relay, voltmeter red to this terminal, black to battery ground post, key in ON/RUN position, now push the raise button, you expect battery voltage. If not you have bad wiring in between the switch and the raise relay.
87 (circuit 170) - key out, pull the relay, voltmeter red to this terminal, voltmeter black to battery ground post, you should get battery voltage, if not either the F1.28 - 30A fuse is blown or bad wiring on this circuit 170
87A (circuit 1205) - not needed

Note to test just the raise relay shown above, you will need a good working relay being plugged/inserted into the lower relay, both relays are dependent of each other. So borrow the relay from the lower I mentioned previously wouldn't work.