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Does anyone know what the GM Wire Color Coding System is? I've been serching the web and found references to it, but no chart. It has to do with the grouping of functions and colors.
Thanks,
Bob
 

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There's a list in the Haynes Chevelle book. Not really grouped by function but lists color and usage. Also contains the "modern usage" of the colors. About 5 pages long and my fingers don't type that much.
 

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To the best of my knowledge, this is correct for a 67 model. Other years may vary slightly, but should be close.It is not grouped, but it may help.
Circuit | Color / Stripe | Description
2 ------- RED-------- Unfused BAT
3 ------- PNK-------- Ignition On/Crank Unfused
4 ------- BRN-------- Ignition ON, and Accessory Unfused
5 ------- PPL/WHT---- Ignition to Neutral Safety Switch
6 ------- PPL-------- Neural Safety Switch to Starter Solenoid
8 ------- GRA-------- Instrument Panel Lamps
9 ------- BRN-------- Park Lamps
10 ------ BLU LT----- Dimmer Switch Feed
11 ------ GRN LT----- Headlamp High Beam Feed
12 ------ TAN-------- Headlamp Low Beam Feed
13 ------ PPL-------- Front Park Lamps
14 ------ BLU LT----- Front Left Turn Indicator
15 ------ BLU DK----- Front Right Turn Indicator
16 ------ PPL-------- Direction Signal Switch-Feed from Turn Flasher
17 ------ WHT-------- Direction Signal Switch-Feed from Stop Switch
18 ------ YEL-------- Rear Left Stop and Turn Indicator
19 ------ GRN DK----- Rear Right Stop and Turn Indicator
24 ------ GRN LT----- Back-Up Lamp Switch toBack-Up Lamp
25 ------ BRN-------- Volt. Reg, Controlled Ref. Volt.
26 ------ BLU DK----- Field Circuit
27 ------ BRN-------- Hazzard Switch-Feed from Hazzard Flasher
28 ------ BLK-------- Horn Switch, Controlled Ground
29 ------ GRN DK----- Horn Feed from Relay
30 ------ TAN-------- Fuel Gauge to Tank Sending Unit
31 ------ BLU DK----- Oil Pressure
33 ------ TAN-------- Brake Warning
35 ------ GRN DK----- Engine Coolant Temperature
39 ------ PNK-------- Ignition On/Crank Fused
40 ------ ORN-------- BAT Fused
43 ------ YEL-------- Radio Feed
44 ------ GRN DK----- Instrument Panel Lamps Feed from Light Switch
50 ------ BRN-------- Heater Switch Feed
51 ------ YEL/BLK---- Blower Resistor Feed, Low
52 ------ ORN-------- Blower Feed High
59 ------ GRN DK/WHT---- A/C Compressor Feed
65 ------ PPL-------- A/C Blower Feed
72 ------ BLK/BLU LT---- Blower Resistor, Medium
91 ------ BLK-------- Windshield Wiper, Low
92 ------ BLU LT----- Windshield Wiper, High
93 ------ YEL-------- Windshield Wiper Feed
94 ------ BLU DK----- Windshield Washer Feed
101 ----- BLU DK----- Resistor Output to Blower Relay
105 ----- BLK-------- Ammeter from Generator (Alt.) (Add Fusable Link)
106 ----- BLK/WHT---- Ammeter from Battery (Add Fusable Link)
119 ----- WHT-------- Generator (Alt.) to Regulator
130 ----- BRN/WHT---- Generator (Alt.) Resistor Wire (Single Strand)
151 ----- BLK-------- Direct Ground
152 ----- BLK-------- Direct Ground
156 ----- WHT-------- Courtesy Lamps Switched Ground


Here is how you identify automotive wire gage. Count the number of strands, then measure one strand, then refer to this chart.
Strands | Strand Diameter | Wire Gage
7------- .25MM/.010"----- ---22
7------- .31MM/.012"----- ---20
7------- .38MM/.015" --------18
7------- .46MM/.018"----- ---16
7------- .59MM/.023"----- ---14
16 ----- .26MM/.010"----- ---18
19 ----- .19MM/.007"----- ---20
19 ----- .28MM/.011"----- ---16
19 ----- .36MM/.014"----- ---14
19 ----- .45MM/.018"----- ---12
19 ----- .56MM/.022"----- ---10
19 ----- .71MM/.028"------ ---8
37 ----- .50MM/.020"------ ---8



If anyone finds any errors, please let me know.



[This message has been edited by KEN67RAT (edited 05-21-2002).]
 

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<BLOCKQUOTE>quote:</font><HR>Originally posted by KEN67RAT:
To the best of my knowledge, this is correct for a 67 model. Other years may vary slightly, but should be close.It is not grouped, but it may help.
Circuit

<snip>

If anyone finds any errors, please let me know.
<HR></BLOCKQUOTE>


Hey Ken do you mind if I copy that ?
http://macc.chevelles.net/wirecode.htm




[This message has been edited by Dean (edited 05-21-2002).]
 

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Sure, Dean, no problem. Cool page

*edit*
BTW, I edited the original post and added circuit # 31.




[This message has been edited by KEN67RAT (edited 05-22-2002).]
 

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Discussion Starter #7
Thanks all,
I am rewiring the engine compartment, and needed to cut out unused wires as well as upgrading the entire system with crosslinked wire and relays.
Bob
 
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