RussWatkins54

2014 F150 FX4 5L lux package (heated/cooled seats)
Truck will not start in the morning due to battery drain. Here are the facts:
- Amp draw is 970 mA
- battery replaced to a GEL high end unit
- if I take the neg lead off over night it starts no problem
- if I take the lead off for one second and place it back then leave it over night she starts no problem (amp meter says the same)
- I hear a hum after I drive home, pop the hood and turn off the truck. Its near the firewall on the passenger side. Same hum is there hours after.
- after reading some similar posts , camera is not blurry, "P" for park lights up when in park.

Update:
Fuse #26 (10amp) or fuse #53 (5amp) when pulled after an hour cooling off period will stop the amp draw.
Any ideas guys ????

4Stroke

You could start pulling fuses until the humming sound stops then see what's on that circuit.

RussWatkins54

PerryB

My first suspect is a faulty relay.

RussWatkins54

I was reading last night on ECM issues. Noticed the ECM is right in the area I heard the humming. Not sure if it's related.

My question you all may be able to help with is on flashing the ECM - worth it ? maybe get that updated and see what happens

Gremlin85

I would try and narrow down things by pulling fuses as suggested first.

You could always do a KAM reset to see if that helps any. Take off both the negative and positive cables from the batter and then touch the cables together for a few minutes. This should drain any capacitors and cause the KAM to wipe out.

Hook the battery back up and start the truck. Let it idle for about 10-15 minutes, then turn all accessories on so it can learn idle with load. Do that for another 5-10 minutes then **** off.

Start it back up and go for a nice 20-30 minute drive making sure you don't turn off the truck during this time.

See if that helps.

TimelessR1

This was my thought too..

RussWatkins54

Ok more info....
I started the truck after sitting all night with the neg battery terminal removed. Let it run for 5 minutes. Turned off the truck and opened the hood. Couldn't hear the humming noise but it was a little windy so I put the Amp clamp meter on and it was drawing exactly half of what it does after a long run. 490mA.
I'm not sure how a "relay" works but does this fit the profile ?

RussWatkins54

Found the fuse that is causing the draw - #26 Powertrain Control Module.
Now what's next ?

RussWatkins54

Replaced the relay for this Power Train Control with no luck.

Pulled a bunch more fuses and found this one that does the same thing and drops the amperage draw to almost nothing .

Fuse number 53 - Run/start –Powertrain control module