I have an old school TAC50. Basically it's a T4 in TAC50 clothes. It will not allow the hall calls to pick. Here are the some specifics. This unit was running until it went down with an encoder fault. The encoder was changed by another mechanic. After this is when I got involved. I have my HCP input on the group. The car shows in auto on motion diag screen. Group controller is showing fire service along with a group fault 11. I am not picking my AHC relay along with my AHC output. Group fault 11 states there is an EEPROM load error. It said to do a group parameter initialization which I did. Hope this isn't all over the place. Trying to get it out while its all on my head! Thanks for any help!
