Need wiring help for 2005 Grand Prix.

derekmac · 11-16-2006, 11:47 AM

Hey all,

I'm hooking up an amp in my 05 Grand Prix with the factory stereo (not Bose) and I'm using a line out converter hooking it to the rear speakers so I can run my RCA cables, but I'm not sure which wires are + and -. Also, where is the best place to hook the remote turn on lead for the amp? Do I have to pull the deck out, or is there a place under the hood that I can hook onto? I'd prefer not to pull the deck if at all possible since I have to run the power cable to the trunk anyway, I'd rather just run it with that.

Thanks for any input!!!!

Derek

durwood · 11-16-2006, 12:15 PM

Crap...I think dark blue and brown are +...or maybe the wires aren't even that color...it's been too long.

There was a rule I used to remember and I thought it was the darker wire was positive. But don't quote me on that one. Use a small battery and touch it to the speakers. If the speaker pushes forward then you have the right polarity. If it pushes backwards you have reverse polarity.

One easy place for remote is the back of any cigarette lighter.

scott_fx · 11-16-2006, 01:00 PM

Quote: Originally Posted by durwood

One easy place for remote is the back of any cigarette lighter.

not always true. the c5 corvette's cig lighter are all constant 12v

spoonraker · 11-16-2006, 01:45 PM

My cig lighters are also constant 12v, I've actually never heard of a car where they're switched...

Anyway the best place to hook the remote wire to would obviously be the remote wire, yes it's on the back of your deck. You could use the ignition wire too, but that would probably also involve removing the deck, or at least more work.

durwood · 11-16-2006, 02:58 PM

yes I should have mentioned to check to make sure it's swtiched. Whoops!

I have never owned a car where the cig was always on. From what I have seen some have a swtiched AND a constant power. I wish I had a constant power one sometimes.

scott_fx · 11-16-2006, 03:10 PM

Quote: Originally Posted by spoonraker

Anyway the best place to hook the remote wire to would obviously be the remote wire, yes it's on the back of your deck.

again... this isn't always the case. when you remove the factory head unit in the c5 corvette it disables the acc wire in hte harness. I had to tap off a wire in one of the wire looms or i could have tapped off of fuse #22.

derekmac · 11-16-2006, 04:59 PM

ok, is the Grand Prix like the C5 where it disables the acc wire when the deck is removed? When I tried to find the acc wire with my test light, the only wire that would light up was the constant power wire, no other wire would light up with the key on.

I even tried the harness for the little computer thingy (real technical I know, lol), and only the battery feed would light up. I know there's an acc wire in there somewhere, but I'm not sure which one it is, or how to find it.

Oh, and I checked the cig lighter, and it has constant power.

durwood · 11-16-2006, 05:18 PM

You could tap right off the accessory wire under the dash. It would require removing a lot of tape and loom. Should be a heavy guage brown wire. Again check this with a multimeter/test light to be sure.

scott_fx · 11-16-2006, 05:54 PM

do you have an acc wire on your hvac? if not get the multi meter out and start checking your fuses.

turbocad6 · 11-16-2006, 05:58 PM

you probably have a retained accessory power circiut that get's killed when the radio is removed.... from what I remember of it, there is a module that you need to add when removing the factory radio, it's mainly to retain the onstar, but it also resores the rap system.... it works through a data buss & the bcm....

just jumping stuff out is not always the best way to approach this really...

derekmac · 11-16-2006, 06:29 PM

I'll have to take the deck out again and see if I can get the test light in the back of the stereo connectors while it's hooked up.

I'm keeping the factory system in the car for now, it sounds pretty good as is, I just wanted to add an amp and a sub just to get a little more of a kick then what the stock system can give.

turbocad6, the retained accessory power circiut that you're talking about, would I still be able to run my turn on lead to my amp from that asuming I can find the wire?

If that doesn't pan out, I'll check the hvac, and the acc wire under the dash.

turbocad6 · 11-16-2006, 06:36 PM

the rap circiut is when you park & turn the key off, the radio & windows & stuff continue to be powered for up to 20 min unless you open a door.... the rap circuit can be tapped at the stock radio, but when you remove the radio it no longer functions...

I would highly recommend retaining the rap circiut by adding the onstar module if the radio is removed... then nothing needs to be butchered at all

with the stock radio, check for ign power at the radio, but with the radio actually plugged in so the data lines are intact...

turbocad6 · 11-16-2006, 06:39 PM

so scott_fx, does that mean your rap isn't functioning anymore either? what about your onstar?

tyman · 11-16-2006, 07:44 PM

Do not use a test light on a radio that is controled by the bcm. You will short the data line and thats not to good! Remove the hush panel and the panel on the end of the dash. The bcm is located at the end of the dash with three connectors. I have provided the pinouts. Pin 23 on connector 1 is switched accy. Do yourself and your expensive car a favour and buy a digital multimeter before you touch anything because if things go sour no dealer on the planet will help you with warranty. Trust me I am a manager at a company that has the cotract to repair delco electronics.

Body Control Module (BCM) C1•

52-Way F AMP (BK)
Pin Wire Color Circuit No. Function
1 BK 860 Wiper High Speed Relay Control
2 WH 1459 Security System Sensor Supply Voltage
3 PK 1439 Ignition 1 Voltage
4 BK 28 Horn Relay Control
5 -- -- Not Used
6 BK 707 RAP Relay Control
7 BK/WH 1969 Headlamp High Beam Relay Control
8 D-GN/WH 1317 Fog Lamp Relay Control
9 PK/WH 1970 Headlamp Low Beam Relay Control
10 WH 1080 Park Lamp Relay Control
11 YE 749 Security Indicator Control
12 GY 91 Wiper Relay Control
13 YE 196 Windshield Wiper Motor Park Switch Signal
14 BK 1835 Security System Sensor Low Reference
15 L-GN/BK 1137 DRL Ambient Light Sensor Signal
16 L-GN 526 Stop Lamp Switch Signal
17 BK 1750 Ground
18 -- -- Not Used
19 BK/WH 151 Ground
20 BK 1950 Ground
21 YE 5 Crank Voltage
22 PK 1239 Ignition 1 Voltage
23 BN 1141 Ignition 3 Voltage
24 TN 185 Low Washer Fluid Indicator Signal
25 WH/BK 644 12-Volt Reference
26 PK/BK 109 Hood Ajar Switch Signal
27 GY 598 10-Volt Reference
28 BK 552 Low Reference
29 BN/WH 230 I/P Dimming Return
30 PK 1444 I/P Dimming Control
31 RD/WH 812 I/P Dimming Voltage Reference
32 -- -- Not Used
33 L-GN 5077 Low Reference
34 BN/WH 1571 Traction Control Switch Signal
35 -- -- Not Used
36 PK/BK 1597 Courtesy Lamps Switch On Signal
37 BK/WH 1455 Keyless Entry Program Enable Signal
38 L-GN 1037 BCM Class 2 Serial Data
39 WH 17 Stop Lamp Switch Signal
40 L-GN 80 Key In Ignition Switch Signal
41 L-BU/WH 1314 Left Front Turn Signal Lamp Supply Voltage
42 D-BU/WH 1315 Right Front Turn Signal Lamp Supply Voltage
43 GY/BK 690 Courtesy Lamp Supply Voltage
44 OG 1732 Inadvertent Power Courtesy Lamp
45 -- -- Not Used
46 OG 340 Battery Positive Voltage
47 RD 228 Windshield Washer Pump Control
48 GY 8 Instrument Panel Lamp Supply Voltage
49 D-GN/WH 1135 A/T Shift Lock Control Solenoid Supply Voltage
50 OG 240 Battery Positive Voltage
51 OG 2440 Battery Positive Voltage
52 OG 1240 Battery Positive Voltage

Body Control Module (BCM) C2

• 52-Way F AMP (BK)
Pin Wire Color
Circuit
No. Function
1 -- -- Not Used
2 RD/BK 780 Driver Door Lock Switch Lock Signal
3 RD/BK 744 Rear Compartment Lid Ajar Switch Signal
4 D-BU 245 Passenger Door Lock Switch Unlock Signal
5 L-GN/BK 748 Right Rear Door Ajar Switch Signal
6 YE/BK 1181 Right Rear Door Open Switch Signal
7 L-BU/BK 747 Left Rear Door Ajar Switch Signal
8 L-GN 1177 Right Front Door Open Switch Signal
9 OG/BK 233 Park Brake Switch Signal
10 -- -- Not Used
11 OG/BK 781 Driver Door Lock Switch Unlock Signal
12-14 -- -- Not Used
15 L-BU 263 Tamper Switch Signal
16 WH 193 Rear Defog Relay Control
17 BK/WH 746 Right Front Door Ajar Switch Signal
18 D-BU/WH 1179 Left Rear Door Open Switch Signal
19-21 -- -- Not Used
22 L-GN 1123 Door Lock Key Switch Lock Signal
23 WH 5075 Current Sensor Voltage
24 PU 1124 Door Lock Key Switch Unlock Signal
25 TN 126 Left Front Door Open Switch Signal
26 GY/BK 745 Left Front Door Ajar Switch Signal
27-29 -- -- Not Used
Service Information Page 3 of 6
30 WH 17 Stop Lamp Switch Signal
31 L-BU 244 Passenger Door Lock Switch Lock Signal
32-34 -- -- Not Used
35 YE 2080
Driver Heated Seat Cushion Temperature Sensor Low
Reference (KA1)
36 PK 2435
Passenger Heated Seat Cushion Temperature Sensor Low
Reference (KA1)
37 YE/BK 2079 Heated Seat Cushion Temperature Sensor Signal (KA1)
38 GY 2434
Passenger Heated Seat Cushion Temperature Sensor Signal
(KA1)
39 TN/WH 2430 Passenger Heated Seat Relay Control (KA1)
40 PU 2477 Driver Heated Seat Relay Control (KA1)
41 -- -- Not Used
42 L-GN 24 Backup Lamp Supply Voltage
43 YE 18 Left Rear Stop/Turn Lamp Supply Voltage
44 GY 8 Instrument Panel Lamp Supply Voltage
45 L-BU 1344 Trunk Release Control
46 TN 694 Driver Door Lock Actuator Unlock Control
47 -- -- Not Used
48 D-GN 19 Right Rear Stop/Turn Lamp Supply Voltage
49 OG 440 Battery Positive Voltage
50 BK 550 Ground
51 TN 294 Door Lock Actuator Unlock Control
52 GY 295 Door Lock Actuator Lock Control

Body Control Module (BCM) C3

• 18-Way F AMP (BK)
Pin Wire Color Circuit No. Function
1-3 -- -- Not Used
4 L-BU/WH 1414 Left Turn Signal Switch Signal
5 L-BU 1714 Windshield Wiper Switch Low Signal
6 L-GN 696 Cruise Control Cancel Signal
7 WH 103 Headlamp Switch Headlamps On Signal
8 BN/WH 301 Park Lamp Switch On Signal
9 BN 738 Horn Switch Signal
10 L-BU 1872 Exterior Lamps Off Input
11 OG 192 Front Fog Lamp Switch Signal
12 PU 524 Headlamp Dimmer Switch High Beam Signal
13 PK 94 Windshield Washer Switch Signal
14 BN 1356 Flash To Pass Switch Signal
15 BK/WH 1251 Ground
16 TN 2144 Hazard Switch Signal
17 D-BU/WH 1415 Right Turn Signal Switch Signal
18 L-GN 1715 Windshield Wiper Switch High Signal

scott_fx · 11-16-2006, 07:47 PM

Quote: Originally Posted by turbocad6

so scott_fx, does that mean your rap isn't functioning anymore either? what about your onstar?

rap wasn't important to me. there are modules from pac-audio and top-down tech that will allow you to retain rap but i didn't see a need for it. as far as onstar...i only have a c5...no onstar :-( though i dont think i'd use it either :-)

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