After replacing the accelerator magnets, only the left one works in the accelerator test; the centre and right do nothing.

Accelerator magnets dead after replacement: each uses different pins of its plug

Cause: Each magnet has a 3-pin plug with only two wires, and they use different pins: left uses pins 1 and 3, centre 1 and 2, right 2 and 3. New magnets come wired on pins 1 and 3, so the centre and right ones were not connected properly.

Checks

• Compare the pin positions in each magnet's plug with the matching plug on the harness.

Fix

• Move one pin in the centre and right magnets' plugs to match their harness connectors (1 and 2 for centre, 2 and 3 for right).

Systems

• WPC-Security (WPC-S)

Games

• No Fear: Dangerous Sports

Related tips

• Slot reels run but don't sync or stop in the wrong order: reel boards and plugs swapped

Source: Pinball Repair help group!! (Facebook group)