87 Accord High Beam Problem

I have an 87 Accord that when I turn on the headlights, sometimes the high beams come on (not at full power but a little dimmer). When I drive, the high beams kick out and the low beams come on and vice versa. I have checked the combo switch and it works fine but can't seem to fix the problem. The pigtails going to the headlights have been replaced as well.