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Old 02-08-2016, 02:28 PM   #1 (permalink)
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Hidden electrical draw

I have an 06 SI with no mods - stock radio. I bought the car a month ago and when it sits unused for 2-3 days the battery dies. When I drive it daily it is fine. The car has a new battery and my mechanic checked all the obvious solutions (battery, alternator, wiring).
He has found an electrical draw coming from the fuse compartment but he says he does not have the expertise to take it further suggesting I should take it to a dealer.
My questions:
- Has anyone had a similar issue and is there a DIY solution?
- I have an OBD reader, would that give me any info to go by?
- If I have to take it to a dealer what do you think should be their proper testing sequence? I do not want to be charged for non-necessary tests.
Any advise would be highly appreciated, I think I may be looking at a major expense here.
Thank you.

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Old 02-08-2016, 03:19 PM   #2 (permalink)
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He has found an electrical draw coming from the fuse compartment
Which box ??

Which fuse # ??

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Old 02-08-2016, 05:00 PM   #3 (permalink)
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Which box ??

Which fuse # ??
I do not know, sorry.
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Old 02-08-2016, 05:08 PM   #4 (permalink)
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Stuck A/C relay?

Battery keeps dying and alternator is ok
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Old 02-08-2016, 07:08 PM   #5 (permalink)
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Thanks but I do not hear this loud spray mentioned in the post above. Are there any tests I can do to identify the right relay? Possibly take out one fuse at s time and measure the battery consumption? Any DYI advice would help, I do not want to pay a dealer for something I can do.
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Old 02-08-2016, 08:44 PM   #6 (permalink)
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if you have a multi meter. disconnect the negative battery cable. Connect the multi meter in series with the negative cable, set on amps. pull one fuse at a time until the amps drop. You can narrow it down to the circuit that way.
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Old 02-08-2016, 09:35 PM   #7 (permalink)
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if you have a multi meter. disconnect the negative battery cable. Connect the multi meter in series with the negative cable, set on amps. pull one fuse at a time until the amps drop. You can narrow it down to the circuit that way.
EDIT: Approximately what amperage should I be looking for for a small leak that take a few days to drain the battery?
Also, where do I find a guide for my fuse box (06 Civic SI)?
Thanks.

Last edited by giorgos236; 02-08-2016 at 10:32 PM.
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Old 02-09-2016, 01:24 AM   #8 (permalink)
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If you have no experience in using a DMM, just bring it to a dealer and make sure that no kid touches your car. Make sure its a journeyman that knows his electrical stuff.

The AC relay does not need to buzz in order to be deemed faulty. If it's stuck on, there will draw of 100+mA (max or 60 for honda). Your mechanic told you that he does not have enough experience to diagnose it and he's right because, not only experience, but also he probably does have access to the complete electrical schematic of your vehicle. Best bet is take it to the dealer that has access to it (obviously). Stop taking guesses. Fix it right the first time.

Last edited by pkscrs; 02-09-2016 at 01:25 AM.
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Old 02-09-2016, 01:28 AM   #9 (permalink)
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Also, if you have an aftermarket remote starter, the remote starter command module can stay awake and cause draw of 60-100mA depending on the remote starter.

I can give you a full power distribution of every single fuse in there but that will take 10 months to do so don't waste your time and go the dealer. lol
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Old 02-09-2016, 10:53 PM   #10 (permalink)
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Just pull a fuse at a time and replace it until you see a significant drop. Try to narrow it down that way. Don't do it right after driving because there are certain systems that take take a few minutes to go to their low power state. Also, if you have the door open and dome light on, when you pull that fuse the draw will drop. Just be aware of those kinds of things. I had a parasitic draw on one blazer I had that I narrowed down to an after market cd player pretty quick. If you have any after market ee1uipment, it could likely be the issue, not a guarantee though. Give it a try before getting charged a couple hundred dollars at a dealer.
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Old 02-09-2016, 11:11 PM   #11 (permalink)
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Watch "How To Perform a Parasitic Draw Test - EricTheCarGuy" on YouTube
https://youtu.be/KF1gijj03_0
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Old 02-10-2016, 06:16 PM   #12 (permalink)
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Does your car have hands free link? Those control units can pull a draw of ~ .250A when they're failing. Actually sometimes they will cause a draw and still operate. I see this on some Acuras. When you get an amprobe to measure draw, take your key out of the car, use a pry bar or long flathead screwdriver to push the hood latch into the closed position (keeping the hood raised), lock the car and arm the security, wait about 15 minutes and measure the amperage draw on the negative battery cable. If you have ~ .225-.250A, unplug the HFL unit and repeat the process.
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Old 02-10-2016, 06:17 PM   #13 (permalink)
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Forgot to say, normal would be ~ 0.042A or less.
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Old 03-19-2016, 12:54 PM   #14 (permalink)
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Hidden electrical draw-img_20160319_122903.png

Hidden electrical draw-img_20160319_122924.png

Hidden electrical draw-img_20160319_122949.png

I am the original poster. Sorry it took a while to respond, I had to deal with back issues. So I checked my engine fuse box and it seems the electrical draw is coming from position 13, the relay highlighted in yellow. Unfortunately without that relay the car does not start and keeping it on dies the battery overnight.

I could not find any description on what this relay does. Also, when I tried to google the relay code (Mitsuba 7002 6417) I could not find the exact relay - found a lot of 7002s though.

Any advice on my next step? Should I just try to replace the relay (a weblink on where to buy it would be great)? Or is it a bigger issue that I have narrowed down somewhat but still need additional possibly mechanical steps?

All advice is highly appreciated, I can deal with electronics but I am ignorant when it comes to cars. Thank you.
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Old 03-19-2016, 02:47 PM   #15 (permalink)
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Any other relays with same # ?? Put it in this ones place, and test.

What is the picture representation on the lid for that relay ??
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Old 03-19-2016, 08:32 PM   #16 (permalink)
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Any other relays with same # ?? Put it in this ones place, and test.

What is the picture representation on the lid for that relay ??
It turns out that I was not checking the fuses properly.

So I checked again my engine fuse box and it seems the electrical draw is coming from fuse #10, called the Back up fuse. It seems that when unplugged my radio and key fob are not working, everything else seems to function. Should I go now in the inside fuse box to narrow down the problem? Any specific fuses in the inside box that relate to #10 on the outside? Any wiring diagrams would be highly appreciated. - Thank you.
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Old 03-20-2016, 03:55 AM   #17 (permalink)
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You need to pull up a wiring diagram for that circuit and see what connects to it. Then isolate the area by repeating the steps and disconnecting what's on that circuit.
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Old 03-20-2016, 10:37 AM   #18 (permalink)
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You need to pull up a wiring diagram for that circuit and see what connects to it. Then isolate the area by repeating the steps and disconnecting what's on that circuit.
Will do. Where can I find the wiring diagram, does my manual have one?
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Old 03-20-2016, 01:38 PM   #19 (permalink)
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Originally Posted by giorgos236 View Post
It turns out that I was not checking the fuses properly.

So I checked again my engine fuse box and it seems the electrical draw is coming from fuse #10, called the Back up fuse. It seems that when unplugged my radio and key fob are not working, everything else seems to function. Should I go now in the inside fuse box to narrow down the problem? Any specific fuses in the inside box that relate to #10 on the outside? Any wiring diagrams would be highly appreciated. - Thank you.
Check out this site:

http://civic.hondafitjazz.com/manual2.html

Wiring diagram would be what you'd want to look at. If you found it to be the #10 under hood it would be time to head inside and pull fuses there. Usually #10 under hood is in conjunction with the Head unit, dash lights, and there are a couple other pieces linked to that fuse.

Last edited by Beckerson1; 03-20-2016 at 01:41 PM.
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Old 03-20-2016, 02:31 PM   #20 (permalink)
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Back up WILL have a constant draw, the question would be how much current. And, is it the fuse/circuits causing the battery draining ?

Drain starts higher, then drops after time. ~15mins w/doors closed

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