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I don't know riderdan but my lightbar is also a 45 inch from a humvee and mine does have the ballast inside. Once I had it hooked up to power it worked. I just opened her up and figured it out. I opened it I removed the connector and spliced into the wiring. Here are 2 pics. Hope this helps.

I've never seen the schematic myself, if I had I would post it. It's just 5 wires. Very easy to figure out without a schematic. The big red wire is power to the unit. The black wire is ground. The other three wires power the relays. Hook the big red wire an black wire up and then test the other...

I run one without the control box. There is a power lead and ground and then 3 relays in the light bar. One for the IR lights and one for each pair of HID. I run one toggle, double throw, down is IR, up us all 4 HID, center is off. Easy to wire yourself.