Do I need the HPOP Gauge Pigtail Harness to install an HPOP gauge on my 7.3L or 6.0L Ford Powerstroke?Updated an hour ago

No, the HPOP Gauge Pigtail Harness is not required to install an HPOP gauge on a 1999–2007 Ford Powerstroke. The pigtail harness provides a plug-and-play installation by eliminating the need to tap into the vehicle’s factory wiring harness. If you do not purchase the pigtail harness, you can install the gauge by tapping into the factory HPOP harness signal wire.