Ultimate A-500

If it's an RE and you replace the solenoids with relay coils (or maybe just resistors) the computer believes everything is "AOK" I have a couple of junk relays hooked to the PCM wires that used to go to the OD and lockup solenoids on the "White Whale III" the 01 2500. Solenoids are now hooked to toggle switches.

If it's the older RH, not an issue

1991-92 would be an RH.
They replaced it with the RE after 1995.
Also you can tell if it's an RH by the 3 terminal connector on the drivers side toward the rear of the case.
RE have 5 terminals if I'm not mistaken.