Volvo Penta Tilt/Trim problem

[FishinPole]

Hi Folks,

I have a 1993 26 foot Skipjack with a Volvo Penta diesel I/O. Engine AD41B (S/N 2204144967, Dual Prop Drive model DP-D (S/N 3102129961). Trim /tilt started giving me problems. At first unit would not go down but now the unit will not go up.

I was able to determine that the motor is okay. If I apply voltage directly to the motor, I can cause the outdrive to go up or down, depending on voltage polarity. Outdrive travels full range and the trim indicator reads correctly.

I am looking for a true, readable electrical schematic and possible explination of how the system is supposed to work. There are 4 relays involved. Two at the controls and two at the hydralic pump. The Volvo Penta manual that came with the unit has a sketch that is more a "pictorial" and thus lacking in detail.

Access to the pump/relays is very limited. Hate to spend too much time on my belly in the bildge unless I have an ideal what to look for.

Any help with source of schematic/parts would be appreciated.

Thanks,

Stas,

aka FishinPole