If the cables were too tight, or the servo was damaged/siezed, this could have indeed cause the PGM to fail.

If a replacement PGM and servo are fitted, just leave the actuator cables unconnected, and then you should see the mechanism operate without putting the replacement PGM in danger.

I would say that if the harness is stock, it is highly unlikely there is anything on it that would cause a PGM failure.

Andy.
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