Hello!
I had to brake hard yesterday to avoid hiting this car in front of me and right after that everything electrical in my car would flash for a split second and come back on.
Car runs fine but everything in the car would flash and ABS and TCS would flash and then its fine.. It happens almost every 20 seconds.. In the morning I noticed that car would start one time and it starts if I try again. Another thing, after I turn my headlights on it would do that again(not all the time)

PLEASE HELP if anyone had similar problems or knows what can be the problem..

Maybe ignition switch ( thats what I came up from looking around forums)

Thanks in advance

 

Make sure the battery connections are tight and corrosion free. Check the ground wire as well.

 

I checked and cleaned battery connections.. Checked 2 ground wires that go from the battery, they look OK.. Drives me crazy..

 

Is it just the ABS and TCS that flash? or is it every thing else as well.

 

ABS and TCS will flash and stay on most of the time. But everything in the car will shut off for a split second and will come back on..

 

I changed ignition switch from Autozone made by duralast and kept doing the same thing.. I opened the fuse box and switched lighting 1 relay and horn relay (since they are the same) and everything works fine... at least for now.. will try tomorrow again and see what I get..
Do you guys thing lighting 1 relay would do something like this??

 

After a hard stop like that I would look for pinched wires - the battery can shift and get something loose-
something could have been on the road and snagged a wire to the speed sensor....
Look under the car for damage

 

I will put it up tomorrow and take a look close under the car.. Thanks for your quick reply 01tl4tl...