I have a 01 chevy blazer with 125k miles, over the past fews months weird things have started happening.

1st, the ABS and brake lights started flashing while I drive, they do not stay on solid. When I go in reverse or put it in park the light go away. We put new brakes on car and checked the sensors and all was well, then 2 days later it started again.

2nd, right around the same time my blazer started having this weird problem where it starts fine and I can drive, however if I need to make a quick stop at a store or something, when I go to start it again nothing happens. I turn the key and the batt light comes on, not clicking or sound comes from teh car except the normal beeping if I don't have my seatbelt on. So I replaced the battery (it has been a while) and cleaned the batt connectors. This still happens and only when I turn the car off for a short period of time. Sometimes if I turn the key and put it in N it will start, other times I have had to move the shifter between N and D and P and then it will start, other times I have to just wait 5 or 10 min.

3rd, at the same time my engine started idling rough, I got a service engine light and got code p0410. I cleared the code and used the information on this forum to check out the code. Everything is fine. The service engine light has not come back on but it still idles very rough.

I do not know if these are connected to each other and it is so strange that they all started at the same time. Is this possibly an electrical problem? I am stumped.