What is a "circle pin?" You talking about the cluster PC board connector. "Signal loop?"
What does or does not work? Do the hazards work? Do the signals themselves.....the ones at front and rear---do they actually work or not work, or are you talking about the cluster indicators alone?
IF IT IS just the cluster indicators, it may be that the cluster PC board is not seeing a ground. Run a separate wire from the cluster and bolt it to the dash frame or steering column support bracket