My daughter hit a big deer in her '88 Chevy van and pushed the bumper/grill/bezels in about 4 inches. I replaced the grill and headlight bezels. Then I found there is only intermittant quad-headlight funtion. I did notice that the 4-way flasher indicators on the dash are on when headlight switch is pulled on. When the headlight switch is pushed off then the 4-way hazard indicators go out until they are activated, then they work normally but only when the headlight switch is off. I checked all four sealed beams and they are good. I cleaned and tightened the left/right headlight grounds on the radiator cross-support. I swapped the headlight switch with another working one with no results. Fuses are good. Any ideas very welcomed.