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Overview
This is a narrow, hands-on how-to focused solely on testing the G5200's three glow plugs: disconnecting the battery, removing the caps and washers, meter-testing each plug, then jumping them to a battery terminal to confirm they heat up, and reassembling everything. All three test good here, so there's no replacement demo. Useful for owners troubleshooting a hard cold-start or no-start diesel issue, not a general overview.
Posted by the LonnieJohnson1 channel, appearing to be an owner walking through a DIY maintenance task on their own tractor.