Padgett Posted March 8, 2016 Report Share Posted March 8, 2016 (edited) My 93 GTP has the "UW4 SPEAKER SYSTEM,6,DUAL FRONT DASH MOUNTED,FRONT DOOR,DUAL EXTENDED RANGE SHELF 6 SPKR SYS" & the amplifier box is behind the radio. On page 132 of the owner's manual is mention of a "gain control" on the driver's door below the window switches. The picture looks like a slider. Nyet. No control on the driver's door no how no way uh-uh. Anyone have any idea where else this gain control might be ? YWTK. Looks like you have to be in edit mode for the line feed to woik. Edited March 8, 2016 by Padgett Quote Link to comment Share on other sites More sharing options...
Heartbeat1991 Posted March 8, 2016 Report Share Posted March 8, 2016 Never seen one. The 89s had a switch mounted there for "extended range". Quote Link to comment Share on other sites More sharing options...
Heartbeat1991 Posted March 8, 2016 Report Share Posted March 8, 2016 It can be seen in this video . .. Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 8, 2016 Author Report Share Posted March 8, 2016 I see something at 1:40-1:50 and again at 2:45 but my door has nada. Owner's manual has this but again the is nothing in or around my door (or any where else I can find. FSM just shows a control in the schematic but not where. Quote Link to comment Share on other sites More sharing options...
94 olds vert Posted March 8, 2016 Report Share Posted March 8, 2016 It has been a long time since I have seen one of those. Quote Link to comment Share on other sites More sharing options...
Heartbeat1991 Posted March 8, 2016 Report Share Posted March 8, 2016 I think I've only seen that on the TSTEs. Quote Link to comment Share on other sites More sharing options...
RPE1992GPSE Posted March 10, 2016 Report Share Posted March 10, 2016 Correct...that is only in the STE sedan models. Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 10, 2016 Author Report Share Posted March 10, 2016 So the coupe just has the amp and is either on or off, no individual volume control. All six speakers are producing sound but the harness is butchered so do not know what is connected to who. Yet. Quote Link to comment Share on other sites More sharing options...
55trucker Posted March 10, 2016 Report Share Posted March 10, 2016 That *gain* control slider in your previous post is a bottom end controller, the STE models got a *better* sound system than the coupes. In the coupe models the amp is always on and is non adjustable, it powers up by the head unit. do you have a GM service manual for the car? The wiring schematic is in the manual. Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 10, 2016 Author Report Share Posted March 10, 2016 Yes I do but first I need to make sense out of the butchered wiring to the Kenwood. and then make a decision whether to install the correct radio or a more modern radio and a different steering wheel without the controls (looks just like the one in the 90 Bonne SE (SE meant something then) bought with 500 miles onnit - am surprised that it is the same wheel when airbags were coming out). Reguardless am going to remove the JVC changer and Kenwood amp & subs from the back. Interesting how vehicle systems have evolved just in the last five years, now all I really want in the car is an amp, speakers, & BT receiver, everything else is done on my phone. Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted March 11, 2016 Report Share Posted March 11, 2016 As far as Grand Prixs go, '88-'89 "Performance Sound" models had sliders, as did the 90-93 STEs. That is all. Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 11, 2016 Author Report Share Posted March 11, 2016 OK have figured out how wiring should go, now need to make sense of the botched up mess that it is at the moment. Original connectors were there just chopped up. Biggest irritant is that one of the chopped wires is C2-7 (dk grn) which is the data link that connects the SWC. Mess How the big connector should be. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted March 11, 2016 Report Share Posted March 11, 2016 I would see if you can find an original pigtail from a parts car or something and just add it back in, then it should mostly be color to color, but when done you don't have to touch it again Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 11, 2016 Author Report Share Posted March 11, 2016 (edited) The one in the second picture is a spare connector with pigtail. Tomorrow I plan to open up the steering column and see if I can find the SWC module and the green data wire. If I go to a different radio I have the 88-04 GM Scosche adapter and will create a stub harness. But first I need to get the stock harness reconstructed. The only one I am not certain about is that green/white stripe in 16. Radio says it is a ground but not that color. OTOH 16 is not present on the Scoshe so won't worry about it. Edited March 11, 2016 by Padgett Quote Link to comment Share on other sites More sharing options...
Heartbeat1991 Posted March 11, 2016 Report Share Posted March 11, 2016 The SWRC module is down under the dash. It's near the column. It's a small, clear rectangular box with a small connector in the end of it. Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 11, 2016 Author Report Share Posted March 11, 2016 Thank you, that helps a lot. Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 15, 2016 Author Report Share Posted March 15, 2016 Found the clear SWC module. Also found a PAC SWI-X under the glove box and connected to the green data wire. Am slowly making sense out of the mess. So far have removed the Kenwood Head unit, JVC changer and control box, Pioneer Subwoofer set and controls, PAC SWI-X, and a whole bunch of monster cables. Tomorrow I'll try to get what is extraneous removed and the stock connectors soldered back in. Then see if a stock radio (have one now and a cassette adapter with microphone for HFP that works well in my 88.) will work with the steering wheel controls. Quote Link to comment Share on other sites More sharing options...
RPE1992GPSE Posted March 19, 2016 Report Share Posted March 19, 2016 It looks like it was amateur hour! Quote Link to comment Share on other sites More sharing options...
Padgett Posted March 19, 2016 Author Report Share Posted March 19, 2016 Tell me about it. Have gotten all of the extraneous wire out of the way and just need one thing before I start rewiring the stock connector (If I add an aftermarket radio, will build a stub adapter) and that is to ring out the second amplifier (UW4) behind the radio cavity & determine if it is working, looks like it is currently being bypassed. Quote Link to comment Share on other sites More sharing options...
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