Parasitic draw | GTAMotorcycle.com

Parasitic draw

nobbie48

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My daughter got linked to a site explaining parasitic drain on her Honda Element. We ran a bunch of tests and it's a challenge trying to figure out what triggers the higher than normal drain.


Apparently the computer needs some power but boosts that to around 200 ma depending on a system of doors and hatches opening and being left open. We ran some tests and recorded the differences then started the car, all going well, we thought.

Two days later the car wouldn't start (Battery 4 volts) so we must have interrupted the sequence in the wrong place. It didn't help that the battery was 11 years old.

One of the things that concerns me if the balance of anything electrical in a newer car. In the old days you spliced in a trailer light harness. Do that today and you fry a module. ($1,000 to $2,000).

Adding an ammeter isn't hard but are they available to detect normal draw and the low parasitic draw?

Will they mess with a module somewhere?
 
You answered your own question.
But you didn’t.

The question was about the installation of an ammeter affecting other electronics.

Also a milliammeter can’t handle normal charge and load currents and a high amperage one won’t register parasitic ones
 
But you didn’t.

The question was about the installation of an ammeter affecting other electronics.

Also a milliammeter can’t handle normal charge and load currents and a high amperage one won’t register parasitic ones
Replacing an 11 year old battery should be the starting point don't you think - how can you trust it ?
 
My mom’s Mazda 3 has to be run every week . New battery , radio memory and onboard computer slowly kill it . one dealer said drive it more , I said you can’t leave it at the airport for a week and then drive home. Second dealer took all connections apart and cleaned them and. Rejigged the computer somehow and it’s better .


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My mom’s Mazda 3 has to be run every week . New battery , radio memory and onboard computer slowly kill it . one dealer said drive it more , I said you can’t leave it at the airport for a week and then drive home. Second dealer took all connections apart and cleaned them and. Rejigged the computer somehow and it’s better .


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Most new cars kill the battery in about a month or so if not run. I will disconnect the battery on my jeep. it never gets driven for months at a time
 
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My mom’s Mazda 3 has to be run every week . New battery , radio memory and onboard computer slowly kill it . one dealer said drive it more , I said you can’t leave it at the airport for a week and then drive home. Second dealer took all connections apart and cleaned them and. Rejigged the computer somehow and it’s better .


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Have heard of brand new Mazda CX-30s batteries going dead after a week's non-use or even after cleaning the car with the doors and windows open.
If replaced under warranty, Mazda will give you the same type. The stock battery is just a 520CCA item.
If you have fitted after-market electronic stuff (anti-theft start/tracking/ multiple dashcams) then consider fitting a 650CCA battery. Hearsay has it that the car charging cycle is designed for the older Lead-Acid type battery.
Also get the dealer to test for parasitic draw.

Oops, forgot that this is a motorcycle forum and not a car forum.
 
My mom’s Mazda 3 has to be run every week . New battery , radio memory and onboard computer slowly kill it . one dealer said drive it more , I said you can’t leave it at the airport for a week and then drive home. Second dealer took all connections apart and cleaned them and. Rejigged the computer somehow and it’s better .


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Does one of the boost charging things work? Part 2 is if the battery goes to zero is it dead forever? Another scenario I don't trust.
 
I finally put a small CTC solar trickle charger on the dash and make her park outside . She hates that . The alternative is doing NASCAR laps in the condo parking garage for 30 mins every 5 days . It’s now a 7 yr old car with 8,000 kms on the dial. She’s 90 and doesn’t want to buy a new car.
My wife’s 7 yr old BMW( has 19,000 on it ) , it can sit three weeks and start no problem


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