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Accord ELD Replacement

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Replacing the ELD (Electronic Load Detector) in a 7th Gen Accord

*Fixes dimming headlight issue

Service Bulletin 05-034 December 14, 2005

First of all remove the fuse box from under the hood.  To do this you must first unbolt the fuse box and then remove the bottom cover to expose all the harness connections as shown below.  Be careful not to put to much strain on the wires while doing this.  Once the box is removed make a note of all the fuses that are installed.  You can use the fuse map on the bottom of the top cover as a guide but taking a picture of the box is a sure fire way to get everything back in correctly (or at least the way it was). 

     

Now its time to take the box apart.  Start by removing all the fuses and relays and set them aside.  Now for the most difficult part. Turn the box over. You will notice that the box is press fit together using guides and hooks.  Start by inserting a flat blade screw driver in various positions to spring the hooks away from the box. Slowly work your way around while prying apart the two half's. Its easier to start in a corner and work around to the opposite side. 

   

Once the box is apart you may notice a lot of loose terminal ends, don't freak out, this is OK, but you will have to put them back so don't loose any.  Remove the 4 larger screws (not the small screws on the board itself) holding the circuit board assembly in place and lift it out.  Now lift the fuse assembly out.  This exposes the ELD (Brown or Gray box). Remove the plates holding it in and un-clip the ELD from the fuse box. 

     

There is one slight external change between the old and new ELD.  The hole in the middle is slightly smaller on the new (Brown) ELD. I can only assume this is to bring the internal windings closer to the plate that goes through the center. This may help the unit sense changes in amperage better. 

 

Once the new ELD is inserted back into the fuse box (MAKE SURE ITS IN CORRECTLY) reinstall the fuse plate and logic board. Now this is where all those terminal ends come into play.  You must put the correct size terminal end on its correct terminal. These are what the fuses connect to from the top.  Most of the time many of the ends stay connected so you have a good idea how the loose ones go back into place. They can only fit one way, this is because of a tab on one side which has to fit in a slot on the fuse box top. One way to tell the correct size and location is to look at the underside of the top fuse cover.  Below you can see how each terminal lines up with a square molded in the plastic, the tab on the terminal fits into a slot cut in each square.

     

Once all the terminal ends are in place you can gently put the fuse box back together. Make sure everything is lined up correctly and firmly squeeze the two half's back together.  It takes a considerable amount of pressure to press fit the box back together.  Once together re-insert the fuses and reinstall the box.