Indiana Jones ninth switch column

Column 9 (violet-white wire, Q11, J5-4 on the auxiliary board): rows 1 to 3 (white-brown, white-red, white-orange) are wheel positions 1, 2 and 3; row 4 (white-yellow) the mini-playfield left limit; row 5 (white-green) the mini-playfield right limit. Rows 6 to 8 are unused.

Systems

• WPC DCS

Games

• Indiana Jones: The Pinball Adventure

Related tips

• Ninth switch column on Twilight Zone, Indiana Jones and STNG
• Solenoid numbers above 28 and the 8-driver auxiliary board
• One switch also triggers others in its column: bent diode on the mini playfield
• Mini playfield switches misread and one switch shows as another: bad diode and miswire
• Indiana Jones: left slingshot switch touching a GI socket
• Indiana Jones: exposed switches at the Path of Adventure get bent together
• Switch columns to U20 pins
• Testing CPU switch columns with the switch levels test

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Two, Clay Harrell (pinrepair.com)