OK, I need help. The "new" Fiero I picked up needs a new radio. The old one was am/fm only and I managed to find a very nice replacement Pontiac Grand Prix DELCO 7 band EQ CD player.

Part number 16228082
SER MAN W
BRSA
PROD DI 2001

Many of the wires have the same colors, I figure that the blues and greens are for speakers. I've been able to get to the point where the time lights up very dimly when the HR and MIN buttons are pressed and can change the time, also the CD player seems to "motorize" I'm afraid that I'm going to mess something up so I've stopped. I realized that I need to get a reducer for the antenna cable as it doesn't fit (too big) even after using the hammer on it (just kidding- though the thought did occur to me)

I've look on line but haven't been able to find a wiring diagram for either one- hoping that I could compare the two to see what I could work out. I've thought about taking it over to a stereo installation place but was hoping that I could get it figured out here first.

Help....

Here you go:

http://installdr.com/Harnesses/GM-Wiring.pdf

You can also buy an adaptor harness at the dealer, or on eBay, or a number of places.

------------------

1984 Fiero SE

F-I-E-R-O,

I did this very swap earlier today.

That diagram is your friend, I have a copy of it in my toolbox.

Just check one wire at a time, some wires on the Newer GM side are not used.

It sounds like your yellow 12 volt ignition wire is hooked up to the Left rear speaker (-)

quote Originally posted by RWDPLZ: Here you go: http://installdr.com/Harnesses/GM-Wiring.pdf You can also buy an adaptor harness at the dealer, or on eBay, or a number of places.

Too late, already cut the original off... But thank you for the link! I'm printing it off right now and will see how much damage I can do with that! I'll have to stop my Circuit City and pick up the adapter for the antenna...

Table 1: Low Frequency Audio Amplifier
Table 3: Radio C1
Table 4: Radio C2
Table 5: Radio C3
Low Frequency Audio Amplifier



Connector Part Information
12110088
24 Way F Micro-Pack 100 Series (GRY)

Pin
Wire Color
Circuit No.
Function

A1
TAN
201
Speaker Feed-Left Front +

A2
LT GRN
200
Speaker Feed-Right Front +

A3
BRN
199
Speaker Feed-Left Rear +

A4
DK BLU
46
Speaker Feed-Right Rear +

A5-A8
--
--
Not Used

A9
BLK/ WHT
351
Ground

A10-A11
--
--
Not Used

A12
ORN
640
Fused Battery Feed

B1
GRY
118
Speaker Return-Left Front

B2
DK GRN
117
Speaker Return-Right Front -

B3
YEL
116
Speaker Return-Left Rear -

B4
LT BLU
115
Speaker Return-Right Rear

B5-B8
--
--
Not Used

B9
DK BLU/WHT
346
Subwoofer Speaker Feed-Left Rear +

B10
LT GRN/BLK
1794
Subwoofer Speaker Feed-Left Rear -

B11
DK GRN
1795
Subwoofer Speaker Feed-Right Rear +

B12
LT BLU/BLK
315
Subwoofer Speaker Return-Right -

Radio C1



Connector Part Information
12047531
10 Way F Micro-Pack 100 Series (BLK)

Pin
Wire Color
Circuit No.
Function

1
GRY
118
Speaker Return-Left Front

2
TAN
201
Speaker Feed-Left Front +

3
DK GRN
117
Speaker Return-Right Front

4
LT GRN
200
Speaker Feed-Right Front +

5
BLK/ WHT
351
Ground-Clean

6
GRY/BLK
308
Park Lamp Switch Signal-Park-Lamps On

7
BRN/ WHT
230
Radio VF Dimmer Feed

8
DK GRN
145
Radio On Output

9
YEL
43
Fused Retained Accessory Power (RAP) Feed

10
ORN
640
Fused Battery Feed

Radio C2


Connector Part Information
12065785
10 Way F Micro-Pack 100 Series (GRY)

Pin
Wire Color
Circuit No.
Function

11-13
--
--
Not Used

14
DK BLU
1796
Steering Wheel Control Input

15
DK GRN
835
Entertainment and Comfort (E&C) Serial Data Communication

16
--
--
Not Used

17
LT BLU
115
Speaker Return-Right Rear -

18
DK BLU
46
Speaker Feed-Right Rear +

19
YEL
116
Speaker Return-Left Rear -

20
BRN
199
Speaker Feed-Left Rear +

Radio C3



Connector Part Information
12064980
9 Way F Micro-Pack 100 Series (BLK)

Pin
Wire Color
Circuit No.
Function

7-9
--
--
Not Used

10
LT GRN
512
CD Right Signal

11
TAN
511
CD Left Signal

12
DK GRN
1947
CD Audio Common

13-15
--
--
Not Used



--------------------------------------------------------------------------------
Document ID# 303939
1998 Pontiac Grand Prix
.
.
.

AM-FM Stereo, Seek/Scan, Clock, Compact Disc, Equalizer (UP3)

Radio/Audio System Circuit Description
Radio
The radio receives battery voltage at all times on circuit 640 through the RADIO BATT fuse in order to keep the clock and preset memory alive when the ignition is in the OFF position. The radio is grounded through circuit 351. When the ignition is in the ACCY or RUN position:

Voltage is applied to circuit 43 through the RADIO fuse to enable the radio operation
The vacuum florescent (VF) display illuminates to display the time or radio frequency setting with the ignition switch
Compact Disc (CD) and Cassette Player
The CD or cassette player, if equipped is part of the radio unit. When operating, the same power required by the radio is necessary for the tape or CD player operation.

Low Frequency Audio Amplifier
The amplifier receives battery voltage at all times through circuit 640. The amplifier is grounded through circuit 351.

YOU NEED AN AMP TO HEAR SOUND OTHER THAN VERY LOW SOUND.
The AMP is list as under the I/P


This Radio has an Antenna module also. It is an AMP also. You may not get reception without it.

(1) Radio Antenna Module
(2) Rear Window Defogger Grid (C1) Connector

The wiring color code changed in 89/90 http://www.installdr.com/Harnesses/GM-Wiring.pdf

All you need is this http://replacementradios.co..._261&products_id=166


------------------

3.4L S/C 87 GT www.fierosound.com
2002/2003/2004 World of Wheels Winner &
Multiple IASCA Stereo Award Winner

[This message has been edited by fierosound (edited 03-10-2007).]