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Diagnosis Parasite in 05' Buick Lesabre
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Eller200
New User
Aug 13, 2019, 5:01 PM
Post #1 of 2
(968 views)
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Diagnosis Parasite in 05' Buick Lesabre
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Hey!
I've came to the internet after exhausting much effort. I'm disabled and it's making this job a bit difficult with one good leg. Let me explain the situation for the vehicle and I'll run down all the steps so far.
Two weeks ago I woke up to a no start car, and tried jumping it and couldn't get it to jump. I thought maybe the starter was going out and I replaced it. But still having the same problems. I've been charging the battery manually and then disconnecting the battery while I'm not using the vehicle.
There's a parasite of about 11.6 amps and I haven't found it yet. This is a serious drain as compared to leaving the headlamps on all night. I found this by utilizing a multimeter and recognize that my battery was draining substantially.
I took steps to read each fuse drop voltage and remove each one to see if the problem goes away.
No luck in finding the parasite in my fuses.
I disconnected the alternator to see whether the drain goes away. No luck, drain occurs when alternator is disconnected. Not sure of anything besides starter and alternator that wouldn't be tied to the fuse box. Anybody have any other electrical equipment in the charging system that I should look at for this issue lemme know!
I'm thinking maybe it's the relays, I haven't tried diagnosing them yet! I'm weary pulling each one out.
I'll look more into the relays, but I'm running out of ideas to find this parasite. I've been running around trying to pinpoint. Maybe I'll break it down by fuse box.
There's two fuse boxes, one under the back seat where the battery is located.
The other is located under the hood next to the coolant tank. I may remove the 13mm nuts and disconnect the red cable to identify which fuse box is causing me so much problem.
I just want to know if I should be looking at anything else that would skip the fuse box radar.
Like the alternator as some may suggest that power still runs and draws even though the alternator may charge when running.
Thank you!
(This post was edited by Eller200 on Aug 13, 2019, 5:04 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 13, 2019, 6:11 PM
Post #2 of 2
(961 views)
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Re: Diagnosis Parasite in 05' Buick Lesabre
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I don't know if you are doing this test correctly or not so I'll give you the complete instructions.
You will need a digital ammeter and a jumper wire with clips on the ends to do this.
First rig any door switches so you can have a door open without triggering the interior lights and unplug the hood light. Remove one battery cable and attach the meter in series between the battery cable and battery post. Take the jumper wire and also attach it the same way. Leave the jumper wire on for at least 30 to 40 minutes to expire all the automatic timers. Now remove the jumper wire and read the meter. Anything over 50ma is too much draw. The way you locate this is to start removing fuses one at a time until the meter drops to normal level. This will be the circuit with something staying on. Determine what components are part of that circuit and check them individually until the problem is isolated.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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