98 Toyota Avalon Stereo Wiring
Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=2631
Printed Date: May 03, 2025 at 7:11 AM
Topic: 98 Toyota Avalon Stereo Wiring
Posted By: azninvasion
Subject: 98 Toyota Avalon Stereo Wiring
Date Posted: August 08, 2002 at 9:32 PM
I am in the process of connecting my new head unit to my toyota avalon. I have completed most of the wiring which follows in this order. The new head unit will run through the factory amplifier and out to all the speakers. The reason I have chose this method is to retain the use of my factory subwoofer. I have completed most of the wiring antenna, amp power, memory power, accessory power, but I am in need of a wiring diagram so I can connect my speakers with the correct polarity. I know I could use the old battery and wire method, but that is too time consuming. If someone could provide me with this particular wiring diagram [ Factory Line Amplifier Output to Factory Head Unit] I would appreciate it. Thankyou for your time. --aznivasion
Replies:
Posted By: lil_joker2k2
Date Posted: August 08, 2002 at 10:48 PM
Posted By: Velocity Motors
Date Posted: August 09, 2002 at 5:13 AM
You can try the local Toyota dealership or try to contact Metra or American International, Best Kits or any other wiring harnes manufacturer for this information. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: azninvasion
Date Posted: August 09, 2002 at 11:49 AM
The wiring diagram doesn't entirely match up. There are several of the same colors and both greens look the same... Even if it says light green or so.. It's just green with grey dots.
Posted By: JayBrown1
Date Posted: August 09, 2002 at 1:57 PM
From the head unit to the amp the wires are as follows: Front left + = Green Front right + = Red Rear left + = White Rear right + = Yellow This system is using a single ground signal to the amp and it is brown. There are two brown wires in the harness for the head unit ,but only one in the harness for the amp. The second brown wire in the head unit harness is for system ground.
Posted By: azninvasion
Date Posted: August 09, 2002 at 4:38 PM
thank you for the info. I have been looking for it for a long time, now that I have all the positive polarity's to the speaker it should't be that hard to find the negative polarity's.. thank you again for the info... --azninvasion
Posted By: azninvasion
Date Posted: August 09, 2002 at 9:18 PM
it would be nice though if you could provide me with the negative pinouts too so i won't have to use the old battery and wire method to find out which pinouts are negative...
Posted By: JayBrown1
Date Posted: August 15, 2002 at 6:42 PM
Since this system uses a factory amp, it does not have individual grounds for each speaker. It is only using a single ground for all the speakers. I don't recommend using the factory amp. If you are trying to retain the factory sub, use an aftermarket amp and wire direct to the speakers. Anything else is going to cause you problems.
Posted By: esomen
Date Posted: August 15, 2002 at 6:52 PM
from my experience , if you want to use the factory amp. you have to connect the amp +B to signal to amp. to power on. aware that.
Posted By: azninvasion
Date Posted: August 26, 2002 at 9:05 PM
I decided to contact bestkits.com for information on installing my stereo and this is what I got. I found out that I probably had a JBL premium stereo in my avalon and the following email outlines what you will need to upgrade your head unit. Hello,
I think what you need is the correct harness. You probably need a 15-pin
harness. The correct harness should be the BHA8110. To interface the system
properly you will also need a Vendetta 4.5 (Interface). You can by them both
from were you made your original purchase. Hope this helps, good luck
Rob O Noguez
Technical Support
Posted By: azninvasion
Date Posted: August 26, 2002 at 9:06 PM
btw. the site where you can find this harness is https://www.autosoundgear.com
Posted By: x_antman_x
Date Posted: October 25, 2002 at 12:48 PM
how did your install go? any pointers? I'm thinking of upgrading my avalon too by replacing the stock amp with a PPI PC650 and getting a 10' JL sub. think I can keep the stock speakers? i think everything in there sounds pretty good as is but lack power and the stock sub is kind of week.
|