Hello all I have a crown RR3000 with a EV100 card number 1C3645LXC01. The truck is a no travel in either direction and no code displayed. The contactors don't pull in. The operator presence swithces are all working properly as are the directional switches and the travel pot is adjusted correctly as well. I am getting correct voltage to the positive side of the contactor but not receiving a negative from the card. However, when I disconnect the negative side of the coil (wire coming from the card) it shows an error code 23. If the card had gone bad would it display a code, or could this be the cause of my problem?

thanks in advance for your suggestions.