The drive is a 12 volt motor with two wires. Connect it directly to 12 volts and the helm turns one way. Reverse the wires and it turns the other way. Do that first and also REALLY check the power supply. I have gone nuts with bad connections that dropped the voltage when the drive motor turns and even worse, you can have an issue where the main power connection is bad and the autopilot is running off the +12 line on the Seatalk bus. That cannot support actually running the drive motor.
Joe Coquina C&C 35 MK I From: CnC-List [mailto:[email protected]] On Behalf Of Larry via CnC-List Sent: Tuesday, November 01, 2016 09:39 To: [email protected] Cc: Larry <[email protected]> Subject: Stus-List Raymarine ST4000 AutoHelm I am in the middle of troubleshooting my auto pilot, but I believe it is a lost cause. The boat is relatively new to me. I have owned it just two seasons. I spent the first season just taking her out occasionally and going through her, cleaning, repairing and replacing items that did not meet my satisfaction. This season I took her out and enjoyed the season. I have always left the st4000 in standby and it seemed to work fine. Then I decided to check out the st4000 out completely and ran into errors. It appears to be fine at first in the Auto mode, until I try to actually use it. It does not actually do anything and within 5 min the display will read “low Battery” and occasionally “no Data”. I checked the voltage to the Unit and it is good. I know I have a little more work to do. Like actually check the drive unit and see if it works at all. I can purchase a control head for 500 dollars on eBay. But I need to determine if anything else is bad first. Has anyone else replace the auto pilot system on their CnC and if so with what. Larry 1986 CnC 38-ft MKIII Freeland, WA
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