Continuously clicking relays???

[Vyper]

I have a 2000 Ford Explorer. While sitting in the driveway overnight, a distinct 'click-click' can be heard under the hood coming from the power distribution box every 2 or 3 seconds. The clicking is coming from the last two relays in the back driver's side of the distribution box, when pulled, the clicking stops. The clicking returns when the relays are reseated. The relays are warm to the touch and the battery is almost completely drained in the morning after this activity continues all night long making it difficult to start the vehicle. The clicking continues when the vehicle is running.

Does anyone know where I can find what those relays are for? Does anyone have any idea what electrical system is stuck in this loop and draining power constantly?

 

[TPLYNCH]

The underside of the relay box cover should have the diagram. You should also check your owners manual.

 

[Robb]

This is for a '95, but should be like yours:

 

[Vyper]

I finally found the owner's manual. The relays are associated with the rear windshield wiper. Looking inside, indeed, the rear wiper switch was in the on position. When the vehicle is on, the rear wiper does not function. Burned up wiper motor?

 

[Eneurb]

The rear wiper will try to park when you turn the key off... maybe that's what it is trying to do, but since the wiper motor doesn't work it will keep trying...

 

[Vyper]

Maybe so, but it is already in the parked position. I will dig in there and unplug the motor for now.

 

[TPLYNCH]

The rear wipers can get out of alignment, so even tho it may look parked, the motor may sense it isn't. With the wiper on, try jiggling the arm around where it enters the rear hatch and see if it starts moving.