Videos of 7 3 powerstroke glow plug voltage Click to view on YouTube4:50Glow plug relay / solenoid test 7.3 powerstroke diesel22K viewsYouTube · 1/14/2015Click to view on YouTube8:17Ford 7.3 Diesel- GLOW PLUG SYS-TESTS58K viewsYouTube · 1/19/2017Click to view on YouTube5:16Powerstroke, 7.3 Glow Plug Relay Test42K viewsYouTube · 8/19/2014Click to view on YouTube3:437.3 Powerstroke Glow Plug Relay Test9 viewsYouTube · 12/6/2016Click to view on YouTube1:25How to test 7 powerstroke GLOW PLUG RELAY170K viewsYouTube · 2/3/2012Click to view on YouTube19:1294-97 7.3 Powerstroke Glow Plug Replacement10K viewsYouTube · See more videos of 7 3 powerstroke glow plug voltage Power Stroke Glow Plug Problem - How to Fix It | Diesel IQ Power Stroke Glow Plug Problem - How to Fix It . If voltage is not present for at least 30 seconds, replace glow plug relay. If voltage is present for a least 30 seconds, Check Glow Plug, with the key off, by disconnecting the connector on the valve cover gasket and measuring the resistance between each of the four glow plug circuits on Ford Glow Plug Problems — Ricks Free Auto Repair Advice Nov 29, 20092 the glow plug connector (GPC) on the right side valve cover, check for battery voltage on the large black/yellow wire. If that’s present, check for battery voltage at the smaller red wire (key on). 3 you see voltage at those two wires, cycle the key off and on while you check the other small wire pink/orange.