Hello. Bought used 6 months ago with 128k miles. Issue started about 4 months ago. First just check park aid, traction control come on. Then the wrench symbol with see manual would come on. Then brake light and traction control. Then other warnings also. Not all at the same time, it would be during different trips. Some trips nothing at all would come on. Two days ago everything started blinking and beeping about a mile before getting to work. Engine ran fine while this was happening and got to work. At the end of the day, truck ran fine the 17 miles home without any warning lights coming on. Yesterday the entire blinking and beeping started 5 miles before getting to work. I have checked all the ground straps I could locate. Has anyone seen this issue before? 9 second video attached.

 

What year and model vehicle?

 

Apologies. I assumed filling out the profile info would allow others to know that info.

2016 F150 4x4 XLT Sport. 3.7 eco boost.

 

You mean 2.7 or 3.5?

 

It’s the 2.7

 

First thing I'd do is clean your battery terminals and get the battery load tested.

 

I put a brand new battery in 3 weeks ago hoping the battery was the issue.

 

But, are the terminals and posts now, clean? Weak battery voltage can cause your symptoms and, poor terminal connections can drop the voltage. The other source of weak voltage would be poor connections to the alternator (I think your truck still has an alternator). If you have these symptoms again, use a multimeter to check the voltage at the battery terminals with the engine running and the warning lights on. Any voltage below 13V would be a symptom of weak alternator output.

- Jack

 

Thank you for the reply Jack. Yes, I used a wire battery brush on the new battery posts and on the inside of each connector to ensure clean connections. With engine running and hazards on I am getting 13.8 a 14.0 on the voltmeter. I also reset the BMS when I installed the new one.

 

OK, that rules out the battery and alternator connections and your voltages are in the normal range for charging the battery. Thanks for getting back to us. I'm at a loss now for why you'd be getting the warning lights.

- Jack

 

The electrical issue I am having is due to the channel running along the passenger side under the plastic trim has standing water in it. So the wire harness running through where the BCM is was flooded. We did have 3 days of very heavy rain when the full dashboard started lighting up. I have the panoramic sunroof which was broken when I bought it. Panel won’t slide but will tilt up. I am aware of the broken hinge issue. I pulled the trim and headliner on both sides and the weep tubes were attached and nothing in the A pillars appears to be wet. Might be running down the B pillars but I’m not comfortable removing the trim due to the airbags. Basically trying to figure out how that water is coming in. Any thoughts?