Asking for help to solve this problem, have a TR98 combine...I pull the thresher button and the thresher starts up normally. I pull the header button and nothing happens. I checked the power at the switch, i got power. I checked the relays that pertain to the header, all checks out. I checked the power at the header drive valve where the hydrallic fluid should begin its flow and I have power there also.. Not sure what I am missing, but wondered if the time delay relay has a function that I do not understand. Any help would be greatly appreciated.