I have a catalina 400 mark II sailboat equiped with Raymarine ST60 wind,St60 Speed, ST60 depth, type 150/400 Autopilot system, ST 6001+ Autopilotcontrol unit, raystar 125 GPS receiver, Raynav 300 GPS Plotter and hsb2 Plus series Color LCD Display. recently I had some sort of surge in which the gps failed and on inspection there was evidence os burn on the gps 125 receiver board. At the same time the ST instruments failed however the 300 GPS plotter still seemed to function as does the LCD Display. I do not have a wiring diag for the "as is" connection of this system. The system is supposedly run together with seatalk wiring. I am not certain how the power is connected to the system except to say the 300 plotter , the 125 GPS receiver have direct power while the remaining instruments are getting power from the seatalk connections but which one is the source or having the voltage is unknown. Where might I get a wiring diag for this system? The 125 GPS has been replaced and new cable run. The unit indicates it is functioning correctly by indicator light but the signal is not being receiver by the 300 Plotter nor the RL70C display. In reading the type 150/400 Autopilot manual, there is discussion of a course computer which does not seem to be part of my system as I cannot find such equipment and assume the 300 Plotter has been substituted. All fuses otherwise,have been inspected and are fine.

GPS - Raymarine - RL70CRC GPS Receiver