Major league hosed

[cowboybobb693 10+ year member]

I wired in my 2 LOCS into my 2002 Chevy Silverado HD. Now the stock head unit is doing something weird. The fader knob controls the balance. I hooked up a Phoenix Gold amp that I had laying around the barn for a couple of years,when I removed it from my last truck it worked fine,now only 2 channels have output, I'm STUMPED.

Okay,i just went out and swapped the RCA's and now the balance knob works, the fader knob is okay,since I ran the wires out of my amp back to the speaker wires and have them now working as a 2 ch instead of the factory 4 ch. I was planning on bridging my amp and using the other ch to run my sub, but I'm not getting any power out of the 2 back ch. Could I have screwed up wiring the LOC'S ??? I followed the directions and checked and double checked the connections.

I REALLY don't want to tear into the wiring again since everything is soldered and shrink tubed

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[BassAddictJ 5,000+ posts]

sounds liek the wiring is screwed up with the LOCs, go back and double check what speakers they are on, and tak einto consideration hwo those speakers react when the balance and fader are adjusted....no reason the stock HU would reverse the bal and fade, its blow up before itd do that...

 

[cowboybobb693 10+ year member]

Thanks BassaddictJ.

As soon as it get above 32 outside I'll do that.

I folllowed the wiring chart from the installers website that is stickied on this site,but,since it does not list models in the 2002 range I wonder if some of the colors/functions are different??

This is what I used.

L/F neg---LT GREY R/F neg---LT GREEN

L/F pos---TAN R/F pos---DK GREEN

L/R neg---YELLOW R/R neg---LT BLUE

L/R pos---BROWN R/R pos---DK BLUE

I used PAC-10 LOCS

 

[Boulderguy 10+ year member]

Sounds like the wiring diagram may not be accurate. Maybe run it all off a single LOC with splitters until you get it sorted out?

 

[cowboybobb693 10+ year member]

The factory radio is a 4 CH. I connected the speaker leads coming out of my amp to run it as a 2CH, but connected the LOCS as a 4CH, does that make any sense??

I just swapped out my amp with another that I had laying around and everything SEEMS to be working properly now. Would it be better to connect 1 LOC as a 2ch ( front/rear left and front/rear right ) coming out of the radio verses 2 LOCS then making it a 2 ch out of the amp??

Thanks for all of the advice.

 

[Boulderguy 10+ year member]

The factory radio is a 4 CH. I connected the speaker leads coming out of my amp to run it as a 2CH, but connected the LOCS as a 4CH, does that make any sense??

Not really, no. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I'd just use a single LOC on the front OR rear HU outputs & go to the amp with it. Keep the fader balanced on zero. This is a 4ch or 2ch amp bridged? If 4ch, then be sure the inputs are correct so the amp's getting the right signal.

 

[cowboybobb693 10+ year member]

After re-reding my previous post even I'm confused.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I'll start over.

I connected 2 LOCS coming out of the RADIO so that I would still maintain the 4CH signal.I used 2 RCA cables going back to the AMP.

Then out of the AMP back to the speaker wires I connected as a 2 CH. Left front and rear as 1ch Right front and rear as 1ch.

Does that make anymore sense??

The AMP is a 2/3/4 channel capable amp. I'm powering my door speakers off of 2 ch's and a small sub off of the 3rd channel

 

[Boulderguy 10+ year member]

OK, so it sounds like you're bridging the amp into 2 ch mode & running your mains off that, then tring to use channels 3 & 4 as a mixed-mono to run the sub - that's what I'm reading above, that right?

If so, stop that! Just run the front spks off ch 1 & 2,

WAIT...A-ha...you're running 2 speakers on each of amp channels 1 & 2 for a total of 4 speakers on 2 amp channels, then bridging the remaining amp channels (3 & 4) for the sub. I get it. What was the original problem again? Can't remember, so long ago...//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

No output on the sub, right? Do this - use two LOC's, the front LOC will supply amp channels 1 & 2, your main speakers, all 4 of 'em. The rear LOC will feed the other two inputs on the amp & become channel 3 & 4, bridged, into your sub. This way your fader will act as a sub volume control.

This will work - provided you wire the LOC's right this time, lunkhead //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif - but you don't have front/rear fade control. What you really need is a dedicated sub amp on top of the 4 ch for the mains. That would simplify your life and likely solve global warming in the process.

Good luck! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

(Oh, and be sure the amp's in 3-ch mode, if its in 2 channel mode that could be your problem too.)

 

[cowboybobb693 10+ year member]

Thanks for the tips. I think what I'l do is just wire the thing up as a 4 ch. 1 Door speaker for each ch and forget the sub. Lot less hassle.

New problems will be given as they occur, watch for up dates.

Thanks for all of the help guys.

 

[cowboybobb693 10+ year member]

UPDATE I checked the LOC's and they are wired correctly,the RCA'S are good. So I said screw it,ran 2 more lengths of wire and hooked each speaker up to it's own channel and it all works fine, balance works like it should, fader works like it should( it should now that I have speakers hooked to the rear channel).

Now I guess I need to get either another amp or could I try and hook 2 sets of speaker leads to one channel, LEFT to channel 1 Right to channel 2 and then hook my sub to the 3rd channel marked "SUB" and see how that works. Im just don't know what ohm's my speakers are rated at, the AMP is an old TOSHIBA and I "BELIEVE " it's rated at 8 ohms per channel.

 

[Boulderguy 10+ year member]

Had no idea Toshiba even made car amps. 99% chance your spks are 4ohm each, so running them all on 2ch's is a 2ohm load, most amps are OK with that, but who knows with your mystery meat amp.

Yes, best bet is to add a sub amp.