On a recent trip the asb light came on and stayed on. The 4x4 high light will blink 8 times every 2 minutes. What could the problem be? We checked break fluid and it looked fine. We also took it to an advance store but they could not check the problem because it was not a check engine light that was on. When we first start the explorer the light stays off for a few seconds then the abs light comes on and within a minute of that the 4x4 high light starts blinking. It blinks 8 times every time with 2 minutes between.