I'm currently troubleshooting a nonfunctional Raymarine
. The control unit seems to be working fine but I get zero response from the wheel
it appears that this model's control unit was plagued with deficiencies. However, I want to confirm all other components of the system are working, including the wheel drive motor
before I pull the control unit to get it tested.
The control unit is receiving power (12.5V according to voltmeter) and receiving accurate data from flux compass
. When put in auto and a course change is inputted, it seems to attempt to try to respond for 10-15 secs before giving either a Low Batt, No Data, or Off Course warnings. (according to internet
the first two are common errors on this model). With no visible or audible response from wheel drive.
I tested voltage in cable at connection to wheel drive and got variations between only 0-2V. A thread on sailnet says this is normal as the unit only "pulses" to activate drive motor (can anyone confirm or reject this theory?).
On that same thread, someone said they tested the drive motor by connecting directly to a 9V battery
. My question is: is this a safe way to test the motor considering it operates with only 2V pulses? Would I be a risk of frying the drive motor by testing in this manner? If this is an okay method, would I be prudent to ground the 9V battery
before connecting to motor?