I have two of these now for over the last 8 years. I installed a better below deck
system but left the wp installed as back-up. I think I could say I know the unit pretty well (nessesity). I was lucky years ago to talk someone at navico to send me a complete 80 pg manual , with full schematics etc. I was able to go on line and find the parts
I needed for penies.
If you open the unit up carefully and put a voltmeter (12dc) across motor wires , then hit controls to go left or right .If controls are working you will see a voltage and motor (if working) will turn. If you put unit into auto and then move it 45 degs the controls will send a voltage to motor to steer in opposite direction. Then go back past starting direction and the voltage should reverse polarity. Check the 2 large transistors at the bottom of the board for corrosion
, these are the ones that switch power to motor. If nothing is happening at the input to these devises then either your compass or the microprocessor is probably blown, time for a new unit. Look for corrosion
on circuit board before changing any parts
. Don't expect Simrad
techs to help much they think they invented the wheel and nobody is capable of changing even the simplest thing. I was told it was liability issues but lets not go there. I hope this helps.
BTW my new auto is not Simrad!