Parasitic Draw, JBL Amp replace, repair

RCX2K

New member
Hi All,

After hours spent locating the intermittent parasitic draw on my battery, I have finally gotten it down to the factory jbl synthesis amp. Every third or fourth time I turn the car off, a faint static noise can be heard from the tweeters. Turn the key back too acc or on and then off again, usually it goes away, sometimes it remains. Doesn't seem to matter if the radio is on or off before turning the key. Need to fix it before I get stranded somewhere (again).

After hours more searching and wading through posts on this and other forums, I am still looking for my best options for repair, replacement, and the definitive answers to a couple of questions. My car is long out of warranty, so the TSB / dealership fix is out, they will only sell the whole module (sub, box, and amp) for an absurd price. Online prices are also in the $3-400 range. For that price, I'd rather look at upgrading the head unit, thereby gaining an aux. input that I'm lacking now. But, I'm happy with the factory sound and looks, and may be selling the car in the next year or two, and so am not really keen on that idea either. What I really want to do is just replace the amp with a used, but known good jbl unit or an aftermarket multi-channel unit that would retain all (or at least most) of the current functionality.

Through all the threads I've read through, I still yet to find a conclusive answer of the feasibility of keeping everything oem, but replacing the amplifier with an aftermarket. If there is anyone out there that can point me in the right direction, it would be most appreciated, as this is probably my preferred fix.

Or if any of you audiophiles out there that have done a whole system replacement still have a working factory amp laying around, I would be glad to offer you a reasonable price for it. Keeping my eyes on ebay too.

Or if any one has had any luck repairing the oem turn on /off switch on the amp, please let me know - I have a call in to United Radio, after reading one other forum user may have sent a unit to them under similar circumstances.

Any and all input is MOST appreciated! Thanks!

Car info: 05' LTD, V8 - 10 Speaker JBL Synthesis w/ RDS and 6 disk in-dash.
 
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How are you testing for parasitic draw?

Also, I suppose you could see if you can get a salvage unit for a lower cost? I'm not entirely sure, but you may be able to wire an aftermarket amplifier in... though I'm not very experienced in the whole audio/visual deal on cars.
 
If it saves anyone else some legwork / phone calls / research who may have the same problem...

Sybesma Electronics, who is listed as the contact company for exchange on the original TSB affecting '04 and '05 4runners, no longer deals in JBL amps. United Radio is the only repair / exchange facility that seems to be dealing with these. Amp model number is 86280-0W150. United Radio charges a flat fee to "recondition" this model, regardless off condition. This flat fee is $308, plus shipping back and forth.

Speaking to a couple of salvage yard guys, this was a big problem for these years, and so the amps are in high demand. Pretty much gotta follow a wrecked 4runner to the lot with cash in hand. I have a found a couple of salvage dealers with 4unners that are not yet inventoried and may have an available part... of course these may be just as likely to go bad.

If there is anyone who could advise on the feasibility of replacing the factory amp with an aftermarket, while retaining the factory head unit and speakers, I would be very grateful. I really don't want to / can't afford to sink a grand into this car for a whole new system.

My other thought is to wire in some sort of switched relay into the power lead for the amp (switched from some other sort of ignition only power back there, like the 12v outlet). If anyone of you wiring / electronic gurus have any thoughts on how one might be able to go about this... it would be most appreciated too.
 
if your going to put any money into the audio system, why go OEM.. use your money for higher quality gear.
 
Other than hearing static, how did you determine the amp is the source of the parasitic drain, and exactly how much is it ??
 
You need multimeter. You disconnect the negative batter lead. Connect the red lead of the multimeter to the battery cable. Black to the post on the battery. Make sure you set it to DC Amps 0.00 or .000

There will be some drain like to keep the radio presets but it's low. I had 1.6amps draw last winter. You can start pulling one fuse at a time or disconnect the plugs on the amp. Check the multimeter after each fuse or disconnect to see change.

CEH
 

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