2014 Ford Edge - Parasitic draw

[OcTico]

I have a parasitic draw. I drive the car home, park it and turn off the car. I hear a high pitch humming sound coming from the engine bay (when car is parked and turned off).  The high pitch humming sound will be stop after a few hours.  I hooked a voltmeter and saw that something is pulling power 2.5amps. I started checking fuses:

1. Removing fuse 86 sounds stops power draw stops 
2. Removing fuse 90 sounds stops power draw stops

3. Check interior fuses nothing would stop the power draw.  
Any thoughts on what can be causing power draw?

Edited December 15, 2025 by OcTico

[GregC]

Having the exact same problem. Any solution found?

[enigma-2]

Fuses control the PCM. 

 

I recently watched a video on YouTube where the mechanic tracked an identical problem to the connector in the tailgate, that connected to the rear wiper. It appeared that water leaked through the rear wiper seal (where the shift exits the tailgate body.)

 

Water leaked through the deteriorated seal and dripped down onto the connector. (Think drip, drip, drip.)

 

This caused green crusties (corrosion) to form between adjacent connections on the connector (on the outside, at the top of the connector.)

This fed the 'wiper keep alive current' to an adjacent circuit, which backfed the leakage voltage back to the fuse panel in the engine compartment; which kept the PCM alive. (Took him several hours to track down.)

 

He was getting just 3 volts (or something lower than battery voltage) in the backfeed; which didn't make any sense. 

 

He found that the crusties acted like a resistor, allowing a reduced amount of battery voltage to be applied to an adjacent wire in the connector, that should be dead when the car was off. 

 

I'd have a close look at the rear wiper seal. If it looks like there's a microscopic gap where the seal exits, I'd get suspicious and pop off the hatchback interior cover and look at the connector. Your car is the right age for a deteriorated wiper body seal.

 

.!@##$ spellchecker...

Edited Monday at 10:55 PM by enigma-2

[GregC]

Thanks Enigma.

 

I was able to fix my parasitic draw issue, or at least it's gone for now.

 

I remembered I was having problems with my ignition key switch a while back where the key was sticking and wouldn't turn easily. I decided to spray electronics cleaner into the key switch and worked the key in and out cleaning debris with a cloth.  The parasitic draw stopped immediately.

 

Similar to the tailgate connector corrosion causing the PCM to not go into sleep mode, the ignition key switch was doing the same.

 

I'm symptom free for 5 days.