Hi all, I'm trying (emphasis on trying) to revive my 'in car entertainment'...

I have a 2000 with an alpine system...but a previous owner for some reason bypassed the system (they used two 3 wire cables behind the head unit to send the powered speaker signals to the back of the car, where they spliced the cables right into the speaker output wires going to the speakers). Thus, completely bypassing the alpine amp.

I'm trying to get this thing back on track and think I have pretty much everything going. However, I noticed there's a white wire disconnected behind the head unit...supposedly it's 12v switched.... but it's not putting out 12v. Instead they patched in a cable to give it 12v from another wire under the cluster.

As I'm tracing wiring back, the 2000 electrical manual says IC1 connector pin 9, which plugs into LH heelboard fusebox, should be the connection point for the white 12v...but I only see white wires going to pin 5 and 6...and pin9 is empty.

Has anyone in their radio adventures ever run into strange issues with how the white 12v switched feed was being run?

Pete

 

Not trying to seem insultive, but, was the ignition on when you metered the white wire? The issue with the Alpine system is the wiring diagram doesn't exactly match the unit. The speaker wires are spot on, but the connection at the head isn't. I spent hours searching the schematic to little avail as I was trying to use the wiring with a different head unit. Like the steering wheel volume control wire for the Alpine doesn't match the base units one (white w/red stripe). I'm gonna pull my steering wheel apart one of these days to determine it.

 

Posting some photos of what you're talking about might help, I recently installed Premium sound in my XJ and got the entire ICE loom from another car. I noticed there were big differences at the HU end owing to the fact the speakers are powered by the HU on the base system and by the amp on the Premium.
I used this thread as reference before I struck lucky and found a premium sound car being broken. It may help you out? https://www.jaguarforums.com/forum/x...-system-86766/

Highhorse, I've got two steering wheels in bits right now if you'd like a photo?

 

I'm not sure I posted all my woes on the first email, but I'll summarize a few as some are completed and may help someone...a few I'm still stuck on.

I think what may have happened was that someone had an aftermarket head unit in here previously, and then put the original radio back without getting the wiring back to stock...so they left the radio in 'Standard mode' and were driving the speakers off the head unit, just like the aftermarket one did. Who knows... that left a few issues:

12v Switch Power - The white lead in the harness behind my radio should have 12v switched on it, but it doesn't. I highly doubt someone decided it would be easier to run a wire all the way around the console to a WhiteGreen lead and get switched powered from that, if they could. Maybe they were charging by the hour and didn't care. Me on the otherhand, I'll spend all weekend chasing this down for free...I love a good challenge. However, not quite sure what was leading to that issue yet. The fuse looks ok, now I'm trying to validate the next hop down the harness, which is in the LH rear seat heelboard. I see signs of 'manipulation'...a bunch of duct tape around the harness leading to the LH fusebox, but that may be unrelated. I don't see signs of anything unusual or custom hacking...yet... I reread the wiring diagram and need to validate I'm looking in the right spot.

Radio inoperative - You can get lost in the abyss of aftermarket radio wiring discussions, but I finally found a post that said 'make sure you switch the head unit to 'Premium' underneath it. I made that change and wow..things actually start to work! So far, things work, except for the Front Left pillar tweeter. I have to validate the amp is kicking it out and that the wiring going to the tweeter is actually live. Perhaps it's just a shot tweeter.. this should be fairly easy to figure out.

Subwoofer - not quite sure if this thing is working well or not..will have to crank up the stereo a bit when it's not 10p at night and see how it sounds...or that there is *some* sound

Wiring Mystery - The wiring I need to figure out is the two bundles behind the head unit, that go to the NAV unit. Everything is working on the Changer and head unit side, so i'm assuming these connections may only be part of the navigation voice control. Here's what I see:
Behind the head unit: One black bundle consisting of two wires (orange and yellow) and a stranded shielding....I have a match for the orange and yellow, no idea what the stranded should connect to. Also, one more black bundle consisting of three wires: green and white, and some sort of stranded lead with a heavy black shielding on it....in this set I have a match for the green. I'm assuming these connect to the wires that some genius cut off about a half inch from the end of the yellow connector. The challenge is, all three of the yellow connector connections have white wires. No problem, look at the wiring diagram, right? Well, it doesn't really outline those very well, and the 'hints' are spread across the premium audio and navigation diagram pages, neither of which detail many of the specifics. As a bonus, I don't have a Navigation disk, thus the navigation isn't doing anything useful to 'try out' different wiring combos with.

..these two leads from the head unit go to the larger of the two connectors at the back of the Navigation unit. I matched them up as well as I could (except for having to pick one of the two white cables on the nav end). Wiring diagram for this doesn't look very accurate either..so It's sort of a guess on top of a guess at the moment. I'm hoping the previous owner cut the wires and didn't mix the pins or do anything...so that the NAV side is correct....then it's just a matter of guessing which white cables do what, behind the head unit and on the nav side...and I should be back to normal.

..Also had a factory phone wired in under the center armrest that I pulled out. Luckily that looked like a single factory connector plugin activity...no more hacking.

Pete

 

Are you sure you're looking at the right wiring diagram? I thought 2000 was about the cutoff when ai-net was used, instead of the regular loom? I may be wrong though.

I would expect the signal from the headunit to go to the amp via ai-net, and it works it all out from there. You should only have power, antenna feeds etc at the headunit end

 

I agree, are you using the right diagram? You can see the AI-Net cable in your first photo. In the case of Premium cars the Ai-Net runs through both the Amp and CD unit before going through to the head unit. I pulled a base loom out my car and fed in the premium loom and I was surprised to find that on the loom is part of the LH rear interior light and a section that meets up with the 12V socket for the rear seats.

 

This is the 2000 x308 Nav diagram I'm going by currently... There are two reasons why I know I'm not completely off track:

1) The wires were cut short on the yellow harness, and the same number of wires are mysteriously left unconnected on these two sets of three-wire looms that were also stock to the car.
2) The diagram shows the Premium ICE system with these three connections the amp and nav.. and three between the head unit and nav...I think that's my target, but nothing is very decisive.

Now perhaps these were still part of the build process on the vehicle, or perhaps these wires are connected regardless of audio option (standard versus premium), just in case someone goes with one config over another, the wiring options are standardized across the loom to keep costs static...but I was pretty sure the wiring wouldn't route to the back for non-premium audio cars, thus other changes would be needed anyhow, so why not just drop these two 3 wire runs to save cost? In my case, perhaps they're useless and superseded in operation with the AiNet... Seems a bit strange...

Pete

 

I'm assuming you're using diagram 17.2 from http://www.jagrepair.com/images/Auto.../jagxj2000.pdf


JagRepair.com - Jaguar Repair Information Resource

 

Correct

 

Hey grandell, didn't the phone option run through the stereo harness also? I haven't played with mine in years since I bypassed it and I don't recall.

 

No idea sorry... but the wiring diagrams have all the info you should need.

DayOff, if your Nav doesn't work, maybe ignore that for now and just try to get the rest sorted? No point making it even more complicated for no reason.

Sorry I can't be much more help

 

No problem - for now I just sealed up the extra wires and will sort it out at a later day - everything else is working, and i don't have a factory phone or Nav currently running to test those..and as much as I love originality...I don't think I'll be poking around with either of those anytime soon.