Jump to content
SAU Community

Parasitic Current Draw

rondofj

By rondofj,
in Car Audio & Electrical

 Share

Recommended Posts

rondofj Veteran

rondofj

Posted
Posted

Hey guys, did a parasitic current draw on my R34GTT- mounted multimeter in series to battery by removing -ve terminal and connecting to the terminal on battery and removed -ve terminal on wire.

Pulling fuses one by one revealed that the audio circuit is eating 0.15ish Amps or 150mA with everything off/doors closed etc for few mins. Current draw should not be more than 50mA. Without fuse it is 50mA, still a bit high. All fuses on, current draw is 0.2-0.18A. (180-200mA)

All it has is a basic Sony MOSFET cd player, standard speakers n tweeters, twin 6X9s in rear shelf, no amps or subs. Basic system. Removing/cutting audio power wire brings the current draw back to 50mA so thats the culprit.

What to do from here? Is it likely a short in audio power wire or a malfunction in unit? Thanks.

post-49401-14318186742917_thumb.jpgpost-49401-14318187117645_thumb.jpgpost-49401-14318187438_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/456681-parasitic-current-draw/
Share on other sites
89CAL Grand Master

89CAL

Posted
Posted

When you say the current draw is 150ma for a few minutes, does that mean the current draw disappears?

It is probably just some sort of storage function of the head unit if that is the case and I wouldn't worry too much about it. I've never been a huge fan of the Sony car audio products, and I don't think they are the best out there. So i suppose if you really want to fix the problem you will probably need a new head unit. That is unless their is something else tee-ed into the audio circuit. Really the head unit controls all the power going to speakers etc, so if there is a current draw there it can only really be the head unit (unless, as I said there is another system on the circuit)

rondofj Veteran

rondofj

Posted
  • Author
Posted

You got me wrong, I meant that the current draw is always 180-200mA even AFTER a few mins with everything off/doors shut etc. I stated the 'few minutes' because some car systems like alarms etc take a few minutes to fully shut down.

I dont think theres anything else tee'ed onto the audio circuit though, the factory loom with green power cable goes right up to the radio. I was thinkin its either the head unit or the power supply cables shorted somewhere in the loom.

Whats the best way to check, I've already wired direct power from battery to fuel pump via a 30A fuse and extra wire to battery. Can I tee a wire off this to the head unit?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      Nah. Was just wondering if you were having a small stroke or if there was some slur/gaf/inside joke that I wasn't aware of.
    • MBS206
      Mistakes were made, my R34 Story

      By MBS206 · Posted

      That was a fark up, it's Salamanca Place I was thinking of. And now I'm curious as to what potential slur/gaf I have caused with Salamander Road, ha ha!
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      Actually everyone on the roads was really well behaved. The only person that did any minor tailgating was a local hoon in a Turbo Focus. Unfortunately we weren't going the same way so there was no grand initial D touge battle. Lots of people pulled over and let me through. The amount of "Hey man nice car, omg skyline, nice 34 man woo" was suprising. Like really suprising. Like almost annoying. My partner was obviously surprised, she'd never seen anyone in the real world point out the car/like the car/want to chat about the car before, so to have like 3 people per day mention it was notable, I could finally say SEE? SOMEONE THINKS THEY'RE COOL. Everyone was also pretty suprised about the weather. Every day was dry and about ~13-14C. Mount Wellington had a sign that said they close the gates at 9pm and I was heading up there at about ~7:30. It was VERY apparent that conditions were getting significantly worse by the minute on the way up and down. The road on the mountain was terrible though, it's no driving road. I have various suspension related questions now. Luckily it was only about 20 minutes from where we were staying to the top of the mountain as said Google maps. We only had the 2 nights in Hobart. We went to the Farm Gate Market though which was really good - And went down to the Hastings Thermal springs/caves down there during the day. I'd definitely be up for going back again, so luckily there's a few more sights yet to see. Didn't get to do the west coast/queenstown/cradle mountain so this was supposed to be a 'scouting' trip anyway of sorts if I were to one day do/take part in/organize a more car-focused trip. As for the boat, it wasn't bad. Well it was bad, but not in the way you're thinking. We did the night trip which leaves at 6:45 (though you have to be there ~2 hours earlier) and arrives the next morning at about 6am. There is nothing to do on the ship. If you plan accordingly and bring a book/tablet/show to watch/charger you can just chill out, take some Travacalm and just sleep through it. The food there is an extremely basic buffet that costs $32 a plate, or $14 for a $3 pizza. The way back we had a travel kettle and a few different types of cup noodles and made our own tea/coffee in the room. This was a far superior way to do it. At the very least book one of the rooms with beds. I guess as we were in the off season we didn't have room mates. You get an option for rooms with 4 beds (2x bunks) or a room with just the two bottom beds. There's also some option for a deluxe queen bed but it's much pricer. We've been on sleeper trains in Asia before so we figured this is similar (and it was)
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      Was that deliberate?
    • Kinkstaah
      gtr hood match gt/gtt front fenders?

      By Kinkstaah · Posted

      You just gotta be really, really, really clear and decisive with what you want your end product to be. 99% of people who want this conversion aren't "I want to run a 295 front tyre!" so they don't really need the widebody. They just want the OEM body to look a little less dumpy, so bonnet, bar, skirts job done with some camber, stretch, slam. It's when you want that, but then decide to pivot later you get big problems. See also if you're willing to get an all in one fibreglass bar, and you're willing to accept fibreglass problems like cracking the entire item on a driveway, instead of just a piece attached to the bottom, etc etc etc. Decide this all before buyin'.
×
×
  • Create New...