From GameWatcher: “Far Cry New Dawn has got a number of missions that aren’t exactly as straightforward as some might have you believe. The timed ‘Through the Wringer’ bomb defuse quest is one of those missions.
Far Cry New Dawn bomb defuse requires you to work fast, since an appropriate countdown timer is triggered early in the quest. If you haven’t been able to complete this mission and want an efficient walkthrough, or simply don’t want to bother too much, you’re at the right place.”
Source: N4G PC Far Cry New Dawn Defuse Bombs – How to Defuse Bombs in Through The Wringer Mission