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Parasitic Power Draw over 10 amps!!

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Old 03-21-2019, 12:41 PM
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The accessory receptacle(s) is(are) always hot. Got anything plugged-in?

Otherwise ... Has any aftermarket wiring been done?
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Old 03-21-2019, 01:38 PM
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Originally Posted by gDMJoe
The accessory receptacle(s) is(are) always hot. Got anything plugged-in?

Otherwise ... Has any aftermarket wiring been done?
.
No aftermarket wiring and nothing plugged in. The only hot wire that makes the draw go away is the main lead connected to the positive terminal that goes down from the battery.
Old 03-21-2019, 01:38 PM
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Originally Posted by dont slow down
Have you had the battery tested at an auto parts store?
Battery hasn’t been tested, how would it cause a draw though?
Old 03-21-2019, 01:46 PM
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~12 volts x 10 amps = 120 watts.....something should be hot.....smok'in hot
Old 03-21-2019, 01:51 PM
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Because batteries can short internally, but now that I think about it a 120 watt phantom draw isn't that much.

Could it be a lamp or something that's not shutting off due to a bad switch? Glove box light, etc...

Last edited by Grrr; 03-21-2019 at 02:00 PM.
Old 03-21-2019, 01:51 PM
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Originally Posted by Narly1
~12 volts x 10 amps = 120 watts.....something should be hot.....smok'in hot
That’s a good point, I should feel around to feel anything being hot. Won’t be back home tell tonight to check though.
Old 03-21-2019, 01:56 PM
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120 watts isn't that much really. Yes it would be hot if it were all in one spot, but let's say the problem is the car's computer running, it's not going to be very hot. The sync system probably uses more than 120 watts in operation.
Old 03-21-2019, 03:16 PM
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Following...

Are you sure your meter is set correctly?

Just a thought, there is a positive cable that runs directly from the battery to the fuse panel under the hood. have you tried disconnecting just that at the fuse panel? There a 10mm nut at the fuse panel you can remove to disconnect it. If the draw falls off when that's done then its something tied into it, if it doesn't then the other cables that are connected to the battery are the issue. Remember you also have a fuse panel on the side of the dash.

Just to make sure, does the truck have auto start? If so, make sure you depress the switch on the drivers side so it doesn't think that the hood is opened possible keeping a module or two active. Also are all the doors closed as well? It might be a good idea that once the doors are closed and hood pin pressed to wait 10-15mins to do the test so it gives the truck time to "go to sleep".

This guy has a lot of great tips!

Wayne

Last edited by Z7What; 03-21-2019 at 03:23 PM.
Old 03-21-2019, 03:37 PM
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Originally Posted by Z7What
Following...

Are you sure your meter is set correctly?

Just a thought, there is a positive cable that runs directly from the battery to the fuse panel under the hood. have you tried disconnecting just that at the fuse panel? There a 10mm nut at the fuse panel you can remove to disconnect it. If the draw falls off when that's done then its something tied into it, if it doesn't then the other cables that are connected to the battery are the issue. Remember you also have a fuse panel on the side of the dash.

Just to make sure, does the truck have auto start? If so, make sure you depress the switch on the drivers side so it doesn't think that the hood is opened possible keeping a module or two active. Also are all the doors closed as well? It might be a good idea that once the doors are closed and hood pin pressed to wait 10-15mins to do the test so it gives the truck time to "go to sleep".

This guy has a lot of great tips!
https://youtu.be/KF1gijj03_0

Wayne
Good video tutorial, that's exactly the way I was taught how to chase down a system draw, hell we even have the same meter lol.


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Old 03-21-2019, 03:58 PM
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Originally Posted by Z7What
Following...

Are you sure your meter is set correctly?

Just a thought, there is a positive cable that runs directly from the battery to the fuse panel under the hood. have you tried disconnecting just that at the fuse panel? There a 10mm nut at the fuse panel you can remove to disconnect it. If the draw falls off when that's done then its something tied into it, if it doesn't then the other cables that are connected to the battery are the issue. Remember you also have a fuse panel on the side of the dash.

Just to make sure, does the truck have auto start? If so, make sure you depress the switch on the drivers side so it doesn't think that the hood is opened possible keeping a module or two active. Also are all the doors closed as well? It might be a good idea that once the doors are closed and hood pin pressed to wait 10-15mins to do the test so it gives the truck time to "go to sleep".

This guy has a lot of great tips!
https://youtu.be/KF1gijj03_0

Wayne
I’ve seen the video and several others. I removed the power cable to the passenger panel with no change.


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