Car Hazard lights turning on by itself

[lucas_]

Last night about 2am (checked cctv). The 2001 honda crv car hazard light suddenly turned on in the parking (its that button at the middle above the aircon). When i found out at 7am. The car couldn't start so i connected the jumper, hence asking the question in another thread. Has anyone ever experienced anything like this, hazard lights turning on by itself? It was locked. I need to gently push the button to turn it off. I got it checked at factory. No problem with electrical or button.

 

[anorlunda]

A short circuit in the electrical system can cause any component to be improperly energized. That includes lights.

If the short is intermittent, it can be very difficult to locate because the problem may not be reproduced at the repair shop.

 

[Charlie Cheap]

The wife has a 2016 Ford escape 1.6 that had a similar problem. I drove her from Abilene, Texas to Ft. Worth for a doctor's appointment. The 4-way flashers came on just for a moment...maybe 10 flashes, before going off. I had hit nothing accidentally. After maybe 50 miles, it happened again for maybe 6 to 7 flashes. I am an ASE mechanic and a 20 year TV repairman with a diploma from Elkins Institute in Dallas for electronics repair. The button her car is on the dash and works fine when pressed. This happened only those two times that I know of. NO IDEA except maybe dust, moisture, or WWII aviation gremlin's.

 

[DaveC426913]

My car started up spontaneously in my driveway one night at 3AM!

(I'd had a remote starter installed.)

I've also had the TV in my bedroom turn on spontaneously. This one coincided with a streetcar going by (about 100 feet from my bedroom window). I assume a spark from the overhead power system mimicked the power signal from the remote.

 

[Baluncore]

Low power electronics employs high impedance circuits that are more susceptible to EMI than well designed circuits. The plastic surrounds offer minimal protection from EMI. Where a momentary press button is used to toggle the state of a flag bit in a CMOS microcontroller, the device can be activated and deactivated by repeated EMI. Parallel copper tracks on a plastic film make a better antenna than does a twisted pair.

Don't park near RF power transmitters on the top of a cold windswept mountains, unless you want to be locked out of your vehicle.

An aircraft carrier visited and anchored out in the bay. The VHF synthetic aperture radar continued to operate, while RC garage doors throughout town opened, or closed, or became deaf.