Tabs won't operate together

[erdoc38]

Hi all,
We have a 2010 370 Dancer, and are having issues with the tabs. Both tabs will not operate simultaneously - neither both "bow up" or "bow down". I can confirm this by listening to the pump at the dock, and by the fact that the boat will roll to one side or the other when putting both tabs up or down. The tabs work fine individually, but when both buttons are pressed, only one operates. It is not consistent which tab moves when both buttons are pressed. Since it's still under warranty, the dealer has been working on it, but have not been able to fix it yet. They've replaced the pump, a control module at the helm, and one in the engine compartment. They thought they fixed it during the winter, but once back in the water it's clear that they're not working. They have been in contact with Sea Ray, but no solution yet. Any thoughts that I can pass along?
Thanks!
Ryan

 

[Tabman]

Ryan,

Do you have the indicator control (Tab position built into the switch)? Or are they "Sea Ray" Rockers Switches or "Bennett Rocker Switches?

Let me know and I will get a troubleshooting guide together for you .

Tom
Bennett Marine

 

[erdoc38]

Tom,
There is no indicator control. It doesn't have rocker switches. It has soft touch buttons that are computer/relay controlled.

Ryan

 

[Tabman]

Ryan,

I suspected that might be the case. Of course we make the Trim Tabs, Actuators (rams) and the Hydraulic Power Unit. The rest is supplied by Sea Ray. The pump is quite simple in its operation. There is a motor that runs forward (Tabs down) and reverse (Tabs up). There are also two valves, one for port and one for starboard.

This is the wiring for those functions:

Red= Port Valve
Green= Starboard Valve
Blue=Motor Forward (pump pressure)
Yellow= Motor Reverse (pump retract)

There is a black ground wire at the pump and likley a relay back by the pump to give it enough voltage to operate.

This is the sequence that the wires are energized at the pump for the various Trim Tab operations:

(+), blue, red = Port trim tab down
(+), blue, green =Starboard trim tab down
(+), blue, red, green = Both trim tabs down
(+), yellow, red = Port trim tab up
(+), yellow, green =Starboard trim tab up
(+), yellow, red, green = Both trim tabs up

If you were to go right to those colored wires right at the pump and "hot wire" the system as listed above you can confirm that the pump is operating properly.

Next step would be to ascertain what wires on the relay back by the pump correspond to the four wires at the pump. Once this is figured out that the relay could be "hot wired" to see if it works.

If the pump and the relay check out, then the hot wire test could be tried right up at the helm where the wires to the relay come up to the switch control box. Again you need to be sure that the wire colors (they may not be blue yellow red and green) are understood to correspond to those at the pump.

I hope this makes sense, show it to your dealer's tech and see if he understands.

Tom
Bennett Marine