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This newest info would have been nice to know, to begin with! someone has supplied your relay with 12V. This can work fine with a few compromises. PM me your number and I'll call you(tell me what time is good for you). We can cover everything in one call.

Use an ohm meter to confirm it is isolated. if you have doubts. I'm confused, your truck was starting just fine, so you changed the relay?(why) The 6.2 will not start at 60-70F without working glow plugs(cold engine). The orange wire is a voltage sensing wire that goes to the controller...

That relay needs to have an isolated relay coil(no connection to ground). I am not familiar with a 109 relay. need more info! If you are installing the wrong relay, you will burn out your GPs and or your controller card. I know there are pictures posted and a recent thread covering this same...