The connector for the factory speaker inputs will not be used if you are going to use line in connectors. You will need to tap into the Remote line on this connector and attach it to the Remote connector on the amp (turns the amp on when your radio powers on). If you are going to use high level connectors, you will need to tap into this connector for the inputs for the amp. The Remote will not be needed if using high level inputs. I decided I'd rather do only a single tap into this connector (the Remote line) instead of 8 taps (4 speakers with a + and - for each). It's generally agreed that line level sounds better too.

And the tap into the Remote line on the same connector.

All hooked up and ready to rock.

Bonus: Since you're already running a power cable for your amp, why not run it just a little further and add a subwoofer? If you want a sub that sounds great but doesn't gobble up cargo space, the Rockville RW10CA works great and perfectly fits where the CD changer was.

Doesn't stick out any further than the CD changer did and sounds great.

This made a HUGE difference in my audio.

I had Pioneer 4 way speakers in my door that were pretty dead with the factory amp since they were only getting woofer frequencies.

Now they sound terrific.

On my head unit, my usual listening volume was around a 10 out of 30.

Now a setting of 12 is almost painful to sit in the vehicle.

If you have any questions I'll try to answer them.

 

Very good write up thank you sir. Gave me Idea's for my amp and speakers. By chance do you have a diagram of what wires go where? Thanks in advance.

 

I apologize I just saw this.

HERE is a link to the PDF that shows the wire colors

Actually, I'll do a screen grab and post it here for posterity in case Metra decides to pull down the page.

 

 

Jeep Grand Cherokee WJ - Stereo system wiring diagrams

 

Does anyone ohave a photo of the alleged plate with two bolts behind the Coolant Resevoir. I am having trouble finding a location to run the power wire

 

IDK about the bracket, but the coolant reservoir is only held in by 2 bolts. I ran power to my amps, light bar, light pods, through the fire wall by the brake booster, tied it up under the front lip of the cowl, then snaked it down under the TCM to the batt. There is another cable gland behind the ECU by the coolant reservoir, but I found the driver's side cable gland much easier to access despite it using more wire. Once inside the cab, I tucked the amp wire to the back seats under the center console.

 

Could you tell me what if anything you had to remove or move to get through the firewall. I have 2000 Jeep Grand Cherokee WJ. I have a Vapor Canister in front of the wire location that goes through the fire wall. But, i do not understand how to get through the firewall grommet. It seems really hard to get through the grommet. Any details about this would be helpful

 

Could you tell me what if anything you had to remove or move to get through the firewall.

Nothing. You can clearly see the cable gland, and the harness going through just to the right amd under the brake booster. I have an arrow pointing right to it in my above pic. Beyond that, follow Gman's advice above. Couldn't be any easier.

 

best bang for the buck replacement amp is the Hyundai Azera uses same four speaker level input pairs as the WJ amp and has 11 output channels

2 dedicated tweets
2 dedicated subs
4 door speakers
2 sail speakers
1 center speaker

excellent sound with quality speakers
runs under $40 at you pull it yards

the to keep from hacking oem harness
the stock WJ amp has male 18 and 12 pin connectors

the stock 07 and up sebring and avenger with amp package has same series connectors with a 14 way and a 20 way and uses a short 1 foot extension with male 14 and 20 way on one end and female 14 and 20 way on other end

the pins from the stock wj harness are easily removed and inserted into the avenger male plugs harvested from the avenger amp extension
the the females from that same amp extension can be plugged in with short wires to adapt to your new amp harness plugs (thus only de-pinning and no cutting of stock WJ amp harness)

read about Azera amp here from guys that dumped their WJ infinity amp upgrades

That 1000 Watt amplifier upgrade - Chrysler 300M Enthusiasts Club

Recently some may have heard about Some 1000 watt amplifier and are wondering the specifics and how to get the system that has everyone talking I have always been interested in Factory Premium Audio and would rather have an OEM system that sounds as ..

300mclub.org

 

best bang for the buck replacement amp is the Hyundai Azera uses same four speaker level input pairs as the WJ amp and has 11 output channels

That 1000 Watt amplifier upgrade - Chrysler 300M Enthusiasts Club

Recently some may have heard about Some 1000 watt amplifier and are wondering the specifics and how to get the system that has everyone talking I have always been interested in Factory Premium Audio and would rather have an OEM system that sounds as ..

300mclub.org

I am very interested in how the installation goes and the results.

 

A squirt of WD40 and a fish wire work well. You might have to push a small Phillips screwdriver in there to create a gap, shove your fish wire through the gap. A length of household Romex/sheathed non-metallic cable works well. The grommet will stretch quite a bit. You can fit at least a 1/0 awg cable through there in addition to the factory harness.

 

^^Same method I used for lighting wires. Worked like a charm. Being the hack I am I merely purchased a $70 buck Wally World self powered sub which is in the spare tire well along with tow straps, gloves, tie downs and the such. Used LOC adapters off the OEM amp under the back seat to power it. Updated the factory speakers with some budget Rockford Fosgate offerings and it sounds pretty darn good actually. Now I need to update the head unit as it has zero display at all, playing the "guess where you are in the frequency range" game gets real old real quick.