I will go back to the wiring in the handle. If the wiring is bad, the indicator lights are not going to change. If SVA were bad, you would see the lights change, but not get your tilt or reach. There is a box above the contactor panel that has 3 or 4 cards in it that contols this. The box basically takes the inputs from you blue button switch, looks at it and the inputs from the raise and lower switches, and decides whether to give you lift, reach, or tilt. If you don't push the button, it stays in lift mode. When you push the blue button, it will go from lift to reach, then tilt, then sideshift if you have this for however many times you push the button. Once you use reach, tilt, or sideshift, and it sees from the raise and lower switches that you have returned the handle to nuetral, the truck reverts back to the lift function. Mis-adjustment of the lowering switch will also keep you from getting into the reach, tilt, or sideshift mode.

You can test SVA if you want, but until you get the sequencing box to cycle through it's functions, SVA will do nothing.

This box also sends outputs to the solenoids on the carriage. Once you get SVA to energize and send hydraulic oil through the hoses in the mast to the carriage, the box sends the appopriate outputs to the solenoids on the carriage to get your reach, tilt, or sideshift functions.

All four wires to the blue button switch and the switch have to be good for this thing to work right. Also check the connctions to the cards in the box. Clean them with electrical cleaner and look for corrosion. The plug to the wiring harness in that goes into the control handle can also have connection problems.