Lionel MTH 79 Flashing Signal

So…here’s what happened. I went ahead and connected it with the red leads going to each lamp. The.blue lead I connected to ground. Assembled everything and applied power…Viola ! It worked !
      If anyone else has a no flashing issue, I used the MTH AG5300000 flasher PCB .
thanks all!

Thanks for posting your solution and the part number. Dad has an early MTH signal that was bought "new" from a local hobby store 20 + years ago, now out of business. A few years ago, went to power it up and found everything lights and nothing blinks. Turned out it appears they had used it in store, tried to fix and repackaged. Large glob of solder melted all over the board. We have been trying to find the part number, even asked MTH Andy at Trainfest 2 years in a row. The second year insisted he would get back to me. I have never been able to find a part number or schematic. It appears to be available from Mike Reagan at MTH parts for $20 plus shipping.