I have a 93 Accord LX F22A1 Automatic. D4 light blinks as soon as I turn the key to the on position. The famous code 7 blinks after I short the test connector. I bought this vehicle used and the previous owner stated they have already replaced the TCU 3 times to no avail. I have already tried replacing the shift solenoids with another used set, still no success. All wiring is good, solenoids OHM out good but still have code 7 as soon as I turn ignition key to on position. Any other clues or hints?????

 

Try checking the wires from the solenoids to the computer make sure it's not broken or short to ground.