Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-20 Thread Max Dillon via Mercedes
Thanks Jaime, I figured out those speaker connectors behind the radio are indeed the rear speaker connectors, so I can use jumpers through the fader connector for the front speaker (+) signal, now I need to figure out the (-) signal. -- Max Dillon Charleston SC '87 300TD '95 E300 On June

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-20 Thread fmiser via Mercedes
Meade wrote: I'm concerned because I've read in several forum posts that modern radios don't like how Mercedes grounded the speakers in the 80's, now I need to see how the Becker 1492 installation compares to my 87 wagon, maybe in '94/'95 Mercedes continued with its speaker grounding

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-20 Thread fmiser via Mercedes
Meade wrote: ...should I combine the front and rear signals (more power) to feed the fader? Bad idea. If the amplifier sections are designed appropriately, it's possible to combine them - but you either get double the current or double the voltage and without changing the speaker impedance

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-20 Thread Jaime Kopchinski via Mercedes
Speakers were not grounded from the factory. Beware if this is the case. Jaime On Saturday, June 20, 2015, fmiser via Mercedes mercedes@okiebenz.com wrote: Meade wrote: I'm concerned because I've read in several forum posts that modern radios don't like how Mercedes grounded the

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread MG via Mercedes
Max, The fader on my 123 just plugs into the wiring right under it. Makes it easy to replace and to run new wires from the radio to that plug. No need to look for any other plug in point. Manfred Date: Fri, 19 Jun 2015 15:21:35 -0400 From: Meade Dillon dillonm...@gmail.com The easiest of all

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Jaime Kopchinski via Mercedes
Hi Meade, You can easily bypass the fader switch... In earlier cars (which I'm familiar with) the fader switch wiring harness has connections to the rear speakers in the center console. If you work with the wire, you can stretch them up to the radio. No need to run new wires to the rear. I run

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Rich Thomas via Mercedes
I think those fader swithces are just variable resistors/potentiometer things. put a meter on it and see what it does. Newer head units (I don't mean Beckers -- no idea what they have -- but any other thing you buy) have the fader built in so you can just bypass it and use the native

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Jim Cathey via Mercedes
If you leave the fader connected for the rears, a rear-seat passenger can lean forward and turn down his own volume when you're making it too loud in back! -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Meade Dillon via Mercedes
Thanks Rich. I think the easy route will be to bypass the fader, I'd like to figure out how to do that without cutting off the fader connector so that it can be restored to stock in the future. I'm not having much luck finding a DIY on the intertubes for which pins to jumper (or run new wires

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Rich Thomas via Mercedes
You could just clip a jumper across the terminals for each side and turn the fader off -- that will create the easy path for the electrons to flow. Won't bugger the switch. --R On 6/19/15 9:26 AM, Meade Dillon via Mercedes wrote: Thanks Rich. I think the easy route will be to bypass the

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Meade Dillon via Mercedes
Dan, Thanks for that info on the CD changer port. I've got a couple of old CD changers, not sure if either works, maybe I can enlist Rich to figure out what the CD changer is saying to the radio to make the CD input active. I have seen a couple of hacks to solder the aux cables to the cassette

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Dan Penoff via Mercedes
Max, In researching possible mods to the 1492s in my W140 chassis cars, I looked at the CD changer inputs and determined that they cannot be used for auxiliary inputs. This is due to the need for a signal to be coming back from the changer for the changer input to be active. It’s not

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Meade Dillon via Mercedes
The issue is that the fader gets two-channel input (only two wires), and outputs four-channels (only four wires). The _ground_ or _negative_ signal to the speakers doesn't go through the fader, it goes from the radio through connector X48H and X48G, which are not listed in the FSM index of

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Rich Thomas via Mercedes
Probably easier to just snake new wires back to the speakers and then connect directly to the head unit or the connector or whatever you can get to --R On 6/19/15 10:33 AM, Meade Dillon via Mercedes wrote: The issue is that the fader gets two-channel input (only two wires), and outputs

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Meade Dillon via Mercedes
The easiest of all will be finding the rear speaker wire connections, hopefully in the center console and accessible without too much trouble. If I can find those, then I can connect the radio directly to the speakers, bypassing the fader. - Max Charleston SC On Fri, Jun 19, 2015 at

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Curt Raymond via Mercedes
curtlud...@yahoo.com; Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, June 20, 2015 3:21 AM Subject: Re: [MBZ] Jaime I need help! '87 wagon radio replacement The easiest of all will be finding the rear speaker wire connections, hopefully in the center console and accessible

Re: [MBZ] Jaime I need help! '87 wagon radio replacement

2015-06-19 Thread Curt Raymond via Mercedes
19, 2015 11:03 PM Subject: Re: [MBZ] Jaime I need help! '87 wagon radio replacement Probably easier to just snake new wires back to the speakers and then connect directly to the head unit or the connector or whatever you can get to --R On 6/19/15 10:33 AM, Meade Dillon via Mercedes wrote