Battery drain found need schematic and advice/help

[shavenasty]

Getting to the short of this, had a battery drain found it( well it could be in one of two locations) its related to fuse #21, its either in the instrument cluster or the instrument cluster harness ( im guessing its in the cluster). If anybody has a schematic of the instrument cluster, and could tell me how to take it apart i would be very thankful. i already have the cluster removed and sitting on my pool table i do not know how to take it apart to get to the circuit board. Also what/where is the (B+) lead or point. the owners manual says fuse 21 is instrument cluster(B+) along with the interior and puddle lights.

 

[Hamfisted]

Multimeter test...

How did you narrow it down to the instrument cluster ? Did you use the mili-amp function of a multimeter to measure amperage drawn on the battery with the instrument panel plugged in and unplugged? Were there any weird happenings on the instrument cluster? What year is your Expedition?


-Mike

 

[shavenasty]

I used a multimeter plugged in line with the battery read at first .98-1.04 amps drain, with the multimeter still inline with battery i pulled fuse after fuse one by one until the most significant amperage drop was noticed which was fuse 21( instrument cluster(b+),interior courtesy lights, puddle lights) dropped to .3 amps. I then replaced fuse and disconnected the instrument cluser in which the amps dropped .0-.13. year of my truck is 06

 

[ml414skidoo]

Hello, having the exact same issue. There is a 0.8 amp draw with all items turned off and vehicle sitting for 30+ minutes.

Pulled fuse 21 (instrument panel, puddle lights, elec park brake), and current draw wnet down to 0.04 amps.

Have you had any luck locating what component on this circuit could be the source of the draw? There are many items listed for this fuse and not sure what the elec park brake release is...

Thanks
Mark

 

[stamp11127]

For the OP and ml414skido:
The majority of the us don't have the equipment for testing or repairing circuit boards at the component level. You would need at least a scope, schematic with test values for each of the test points, power supply, signal generator and finally the soldering/de-soldering tools. And on top of that, multi layered boards are a pain to fix. The only time you get into that is when it is a proprietary board that costs thousands to replace.

I'd recommend getting a Ford wiring diagram off ebay and see if anything else ties into that circuit. Then disconnect them one by one to see how much the current drops.

 

[ml414skidoo]

Have replaced battery with new and re installed puddle lamp/interior lamp fuse 21. Can leave Navigator sit for multiple days with no issue and quick cranking speed.

Out thought myself, just replace with fresh battery ... Costo $75.

 

[PDMill]

OP and ml414skidoo,
I've got the same issue, my draw to the instrument panel is 0.53 Amps.
Were either of you able to fix the instrument panel or did you have to R&R the entire assembly?

-PMill

 

[Bedrck47]

OP and ml414skidoo,
I've got the same issue, my draw to the instrument panel is 0.53 Amps.
Were either of you able to fix the instrument panel or did you have to R&R the entire assembly?-PMill

You are replying to a thread that is more than 2.5 years old. The people that are on that thread my have been inactive and you may wait a long time for them to reply to you. Your best bet would be to start a new thread and state your problems in detail and also give the year and model information. This way you will get replies that will help you.

 

[Skauber]

You need to check it after at least 40 minutes, preferably after 1 hour. The instrument cluster will show a drain for more than 30 minutes on its own, and it is completely normal.

Follow the drain test procedure here to ensure all modules are in sleep mode:

https://www.youtube.com/watch?v=ES-rjFfuxq4