Nakamichi Update - '99 LX 470

[PabloCruise]

No power to the head unit, or no sound from the speakers? If the head unit powers up, but no output, I'd check the connection of the amp turn on wire, pin 14 on the connector.

Do you have a multimeter? If so, you should be able to check for constant +12v at pin 1 and switched +12v at pin 10 as well. The hardest part of the install for me was cramming the connector and all the wiring behind the new head unit, so I'd be suspecting something got pulled out of a connector, or a live wire shorted to ground somewhere.

I agree about cramming the unit back in there after getting everything connected - Like putting 10 lbs of stuff into a 5 lbs sack...

 

[deconomist]

Hmm, I'll try to take a look at my '99 FSM tonight and see if there are any other fuses. If that last thing you touched was the USB, maybe re-trace those steps to see if anything else got disturbed? Did you replace the lighter socket with one of the pre-wired USB sockets that plugs into the back of the head unit? Did you just unplug the original power connector from the back of the cigarette lighter when you removed it, or cut it?

It’s definitely not getting power. The yellow wire showed no voltage. I pulled the 12v and light off the cigarette lighter and covered the connections with electrical tape. It’s on its own fuse so I am not sure it would cause the issue. The other 12v on the right is fine as well. I heard some noise when connecting the preamps for the speakers. Is it possible I blew something on the amp? Seems plausible since both antenna and radio isn’t working but everything else is.

To make matters worse, one of the speaker pins (both ground and live) came out in the harness while jamming it back in. Repinning it isn’t working (they won’t stick) so I fear the clip in the pin out of the harness itself broke.

 

[PabloCruise]

If the pins can come out of their seats, they will!

“I heard a noise...” Did you disconnect the battery before install?

 

[shtbrwn86]

Can you pull it all back out and make sure it all works? Shoving those wires back in there was a royal PITA!!! Especially with the harness for my stereo. I actually wrapped all the connections in electrical tape for a bit more grip just in case.

 

[deconomist]

If the pins can come out of their seats, they will!

“I heard a noise...” Did you disconnect the battery before install?

It was connected. I had undone it and reconnected it to test. Pulled everything apart again to run the USB and forgot because my kids were visiting me while working and distracting me. Stupid mistake I know.

The noise was when I connected the pre-amp which is why I think it is an issue at the amp. I may have to take it to a shop and have them check it out n

 

[deconomist]

Can you pull it all back out and make sure it all works? Shoving those wires back in there was a royal PITA!!! Especially with the harness for my stereo. I actually wrapped all the connections in electrical tape for a bit more grip just in case.

It’s not getting power. I was testing it while the radio was out. Had to put it back together so the truck was presentable.

 

[dbfw]

It’s not getting power. I was testing it while the radio was out. Had to put it back together so the truck was presentable.

I just had a look at the stereo section of my '99 FSM. I don't have the full schematic to see why, but the amp no power troubleshooting flow specifically mentions checking the CIG fuse. Since you did have those wires out, it might be worth swapping it for a known good fuse to see if that helps.

 

[deconomist]

I

I just had a look at the stereo section of my '99 FSM. I don't have the full schematic to see why, but the amp no power troubleshooting flow specifically mentions checking the CIG fuse. Since you did have those wires out, it might be worth swapping it for a known good fuse to see if that helps.

I looked to see if any fuses looked broken. Nothing stood out but I may just change the cig fuse to be sure.

I may just need to bypass the amp and run the speakers off the head unit until I figure out what I want to do.

 

[deconomist]

Took it to a local shop for them to diagnose. Turns out it was the harness and not the amp. They have it all running now, but unfortunately they closed early and when I picked up my truck it has the interference hiss. I bet they re-wired everything and used the speaker outputs from my head unit and not the pre-amp. I can’t hear it when I have music playing but I’ll call them when they open again Monday to see if they can fix it.

 

[jLB]

I agree about cramming the unit back in there after getting everything connected - Like putting 10 lbs of stuff into a 5 lbs sack...

I guess that's at least one advantage of using the Sony XAV-AV1000 (double DIN front, single DIN rear) there's plenty of room back there. Not that I'd recommend it, but enough room that I shoved a Yaesu FT-8800 into the available extra space.

 

[PabloCruise]

Took it to a local shop for them to diagnose. Turns out it was the harness and not the amp. They have it all running now, but unfortunately they closed early and when I picked up my truck it has the interference hiss. I bet they re-wired everything and used the speaker outputs from my head unit and not the pre-amp. I can’t hear it when I have music playing but I’ll call them when they open again Monday to see if they can fix it.

At least you didn't blow up the amp!

 

[PabloCruise]

I guess that's at least one advantage of using the Sony XAV-AV1000 (double DIN front, single DIN rear) there's plenty of room back there. Not that I'd recommend it, but enough room that I shoved a Yaesu FT-8800 into the available extra space.

Excellent use of space!

 

[shtbrwn86]

I guess that's at least one advantage of using the Sony XAV-AV1000 (double DIN front, single DIN rear) there's plenty of room back there. Not that I'd recommend it, but enough room that I shoved a Yaesu FT-8800 into the available extra space.

Yeah i really wanted one of those types of stereos but i also wanted decent sized physical volume buttons since i dont have steering wheel controls and that was hard to find.

 

[shtbrwn86]

Noticed a weird quirk with my stereo recently after switching from stock to an Alpine. In all my testing (in ACC mode) as soon as i put it into ACC there stereo would come on right away.

When i actually start the car, there's like a 3-5 second delay before it turns on. I figured it was the stereo but wanted to see if anyone else had this problem.

It's just mildly annoying, but the worst part is that by the time it comes on I'm usually done backing up so the camera doesn't really help much.

 

[dbfw]

Noticed a weird quirk with my stereo recently after switching from stock to an Alpine. In all my testing (in ACC mode) as soon as i put it into ACC there stereo would come on right away.

When i actually start the car, there's like a 3-5 second delay before it turns on. I figured it was the stereo but wanted to see if anyone else had this problem.

It's just mildly annoying, but the worst part is that by the time it comes on I'm usually done backing up so the camera doesn't really help much.

I've noticed something similar on mine, and have a guess, but at this point just that...a guess.

These newer units are basically tiny computers that have a boot sequence they need to go through before they're up and running, much more so than the original "instant on" of the factory unit. I've noticed similar delay with mine in this situation: I start up, drive a short distance to the cruiser's natural habitat (gas station). I turn the engine off, but leave the key in the ACC position so my wife can keep listening while I fill up. When I get back in to restart, it of course powers off during cranking and then takes quite a while to come back.

Here's my theory on what might be happening.

As the key is turned from off to start, it must pass through the ACC and ON position, briefly powering the unit. Then as they key is turned to the start position, the power is cut, and then returned once released. I think this ON/OFF/ON pulse is triggering a partial boot initially, which is quickly interrupted, and then must reset again once the engine is running.

My only reason for believing this is years working in IT and seeing all sorts of equipment not happy after quick ON/OFF/ON power cycles.

 

[deconomist]

My KENWOOD is the same way. Takes about 10 seconds to boot up. It’s annoying, but I’ll take that to get wireless CarPlay and hands free calling

 

[jLB]

Noticed a weird quirk with my stereo recently after switching from stock to an Alpine. In all my testing (in ACC mode) as soon as i put it into ACC there stereo would come on right away.

When i actually start the car, there's like a 3-5 second delay before it turns on. I figured it was the stereo but wanted to see if anyone else had this problem.

It's just mildly annoying, but the worst part is that by the time it comes on I'm usually done backing up so the camera doesn't really help much.

I’ve seen this on one of the head units that we had in my son’s 00 LC.

At first I thought we may have had a bad connection on the unswitched 12v+ connection, but in our case it seemed to be a poorly implemented “sleep mode” that caused a “cold boot” on every start.

I wonder if another source for 12v+, or a software switch for enabling “sleep mode” might fix your issue?

 

[shtbrwn86]

Interesting. I was thinking my stereo was a dud (bought it used) but doesn't seem like it now. I can definitely live with this.

 

[shtbrwn86]

I've noticed something similar on mine, and have a guess, but at this point just that...a guess.

These newer units are basically tiny computers that have a boot sequence they need to go through before they're up and running, much more so than the original "instant on" of the factory unit. I've noticed similar delay with mine in this situation: I start up, drive a short distance to the cruiser's natural habitat (gas station). I turn the engine off, but leave the key in the ACC position so my wife can keep listening while I fill up. When I get back in to restart, it of course powers off during cranking and then takes quite a while to come back.

Here's my theory on what might be happening.

As the key is turned from off to start, it must pass through the ACC and ON position, briefly powering the unit. Then as they key is turned to the start position, the power is cut, and then returned once released. I think this ON/OFF/ON pulse is triggering a partial boot initially, which is quickly interrupted, and then must reset again once the engine is running.

My only reason for believing this is years working in IT and seeing all sorts of equipment not happy after quick ON/OFF/ON power cycles.

I think this is spot on. In fact, just today I turned it to ACC, let it sit for like 10 seconds, then started it and it came up just fine.

 

[ZFZJ80]

Hey guys.... So I installed an Alpine ilx-W650 this week in my 98 LX470 using the adapter and making up the harness myself and got it all plugged in and boom, sounded great! Then I started the truck and I have a lot of "noise" coming through. Has anyone had this happen doing this harness/install? Suggestions on eliminating it (other than just turning up the radio haha)?

Thanks in advance!