Wires under dash-pic or diagram??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1970blazin · 08-10-2003, 11:02 AM

Does anyone have a wiring diagram or a picture of how the under dash wiring should look? I have so many wires under there I don't know where half of them go. Do I just have to follow each wire and label it and go from there, or what? What a mess! Thanks in advance for any input!
1970blazin

**FRENCHBLUE72** · 08-10-2003, 11:33 AM

If I remember right most of the wire's only plug in to one item, meaning each connection can only go one place and will not fit where they do not belong... It's beem awhile since I crawled under the dash to be a contorinist..

Billy G · 08-10-2003, 11:39 AM

I dont know if this will help or not, but it's a dash wiring diagram I came across for 67-72 trucks.

Hope it helps...

Billy G

Dash Wiring Diagram

cdowns · 08-10-2003, 11:52 AM

my opinion for this is to spend the $30 that it will cost with shipping and get yourself the correct service manual and you'll have the wire diagram and a whole lot more

jay-dawg · 08-10-2003, 12:37 PM

I dont know if this will help

jay-dawg · 08-10-2003, 12:38 PM

maybe it will, maybe it won't.

jay

SWINGSAX68 · 08-10-2003, 06:12 PM

JAY-DAWG
Hey that is like my fuse box...but upside down????
I've never seen a box like that. If I put my fuse box in the same position, all the text would be upside down.....HMMMM....I wonder why ours are different.

CoryM · 08-10-2003, 07:45 PM

For diagrams look at my page. I have most of them for 67-72.
As for the pysical wires just follow them and label them. What are you doing anyhow?
CoryM

jewels. · 08-10-2003, 08:18 PM

Quote:

Originally posted by cdowns
my opinion for this is to spend the $30 that it will cost with shipping and get yourself the correct service manual and you'll have the wire diagram and a whole lot more

hey, cdowns, what manual are you talking about? and where can we get it?

thanks!

jewels.

jef5150 · 08-10-2003, 09:01 PM

http://www.gmcpauls.com/manuals.htm ,jeff

BobbyK · 08-11-2003, 07:37 AM

I'm rewireing my truck as we speak.
These are the pic's so far.

new fuse box as seen though the hole for the inst. cluster

Main dash feed from fuse box.routed up and over opening that gauge cluster fit in.Looking at light switch.

The view back to the center of the dash.Wires going to heater switch

I'll be takeing pic's of the connections at the fuse box in the A.M.(Monday)The A/C/heater wire loom connects to the "CIG" and "IGN UNFUSED" terminals.I can't remember the color of wires that connects where though.I will post those pics in the a.m.

1970blazin · 08-11-2003, 07:22 PM

Thanks BobbyK- that is what I was lookin' for- I am just trying to clean up all the loose wires and get rid of what I don't need. Keep em coming!

*rickspickuppart* · 08-11-2003, 07:59 PM

I have the service manuals for 25.00 plus ship pm me if interested (and I need to know the year they are different)

1970blazin · 08-11-2003, 09:39 PM

This is what I am dealing with-Whew! Not looking forward to it!

BobbyK · 08-12-2003, 04:38 AM

Ya that's the rat's nest I had under my dash as well.
I took evrything out from under the dash.The wiring and ducting (both the soft tubing and the formed duct-work)
It makes it ALOT easier to get under the dash to re-route the wires.

Click here to see the pic's of the my rewire job.The album also includes pic's of the rebuilding of the A/C system and ductwork.It' not done yet but you can see the pic's I have so far.

johnny209 · 08-07-2017, 06:07 PM

Quote:

Originally Posted by jay-dawg

I dont know if this will help

I know this thread is old but I am trying to figure out what that big plug at the top of the fuse box is for. They are heavy gauge red and green wires with a smaller black one.

**VetteVet** · 08-07-2017, 10:29 PM

That's the horn relay. some of them were mounted over by the steering column.

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johnny209 · 08-07-2017, 11:48 PM

Quote:

Originally Posted by VetteVet

That's the horn relay. some of them were mounted over by the steering column.

Attachment 1678367

Attachment 1678369

Thank you!!! I didn't even think about a horn relay. And my Haynes manual wasn't much help.

08-10-2003, 11:02 AM	#1
1970blazin Blazerless:-( Join Date: Jun 2003 Location: Olympia WA Posts: 1,612	Wires under dash-pic or diagram??? Does anyone have a wiring diagram or a picture of how the under dash wiring should look? I have so many wires under there I don't know where half of them go. Do I just have to follow each wire and label it and go from there, or what? What a mess! Thanks in advance for any input! 1970blazin __________________ 1970blazin 1970 CST Blazer-Orig. Dark Blue-SOLD Progress Pics of Blazer for sale

08-10-2003, 11:33 AM	#2
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,589	If I remember right most of the wire's only plug in to one item, meaning each connection can only go one place and will not fit where they do not belong... It's beem awhile since I crawled under the dash to be a contorinist.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

08-10-2003, 11:39 AM	#3
Billy G Registered User Join Date: May 2003 Location: Dayton, Tx (in Old River) Posts: 286	Wiring Diagram I dont know if this will help or not, but it's a dash wiring diagram I came across for 67-72 trucks. Hope it helps... Billy G Dash Wiring Diagram __________________ My FAMOUS LAST WORDS...."Ima Gonna!!" - 1970 GMC 1500 swb/step 250 I-6 3 spd - "The GEM" - 1976 Chev Scotsdale swb/step 350/350 - "The JEWEL" - 1982 Chev C-10 swb/step 250 I-6 3 spd - - 2001 Chev Silverado LT -

08-10-2003, 11:52 AM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	my opinion for this is to spend the $30 that it will cost with shipping and get yourself the correct service manual and you'll have the wire diagram and a whole lot more __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

08-10-2003, 12:37 PM	#5
jay-dawg chevelito Join Date: Jun 2001 Location: Honolulu, HI USA Posts: 1,609	I dont know if this will help Attached Images __________________ New deadline...when my son can drive. Aloha from Honolulu, HI

08-10-2003, 12:38 PM	#6
jay-dawg chevelito Join Date: Jun 2001 Location: Honolulu, HI USA Posts: 1,609	maybe it will, maybe it won't. jay __________________ New deadline...when my son can drive. Aloha from Honolulu, HI

08-10-2003, 06:12 PM	#7
SWINGSAX68 Now the others dig........ Join Date: May 2002 Location: San Antonio, TX Posts: 1,520	JAY-DAWG Hey that is like my fuse box...but upside down???? I've never seen a box like that. If I put my fuse box in the same position, all the text would be upside down.....HMMMM....I wonder why ours are different. __________________ 68 Chevy C10 Stepside Black Primer 78 GMC Longbed White 09 Chevy Silverado Shortbed Granite Blue *LOOKING FOR A 67 4 DOOR IMPALA!!!Just like Sam and Dean Winchester!! 'Cause Mustangs are for p^#$ and you can fit a body in the trunk of a 67 Impala* MEMBER OF THE DRUM BRAKE CLUB Bachelor of Music in Jazz Studies Texas State University-San Marcos, TX Certified Music Educator I hope Mom is up there watching and being my Guardian Angel "I've got a fever.....and the only prescription.....IS MORE COW BELL" -The Legendary: Bruce Dickenson "F#$@ 'em up!!!!!!" -The Legendary: Rogelio Escobar TRUCKY LINKS** http://67-72chevytrucks.com/vboard/s...d.php?t=457750 http://67-72chevytrucks.com/vboard/s...d.php?t=461184 http://67-72chevytrucks.com/vboard/s...d.php?t=472848 http://67-72chevytrucks.com/vboard/s...d.php?t=417541 http://67-72chevytrucks.com/vboard/s...d.php?t=477788

08-10-2003, 07:45 PM	#8
CoryM Registered User Join Date: Dec 1999 Location: Surrey, B.C. , Canada Posts: 874	For diagrams look at my page. I have most of them for 67-72. As for the pysical wires just follow them and label them. What are you doing anyhow? CoryM __________________ 1970 heavy duty C-10 fleetside sport truck. Vancouver B.C. Canada http://www.geocities.com/chevroletc1070 "Take up our quarrel with the foe: To you from failing hands we throw The torch; be yours to hold it high." Lieutenant Colonel John McCrae, Canadian Army

08-10-2003, 09:01 PM	#10
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	manuals...........jewels http://www.gmcpauls.com/manuals.htm ,jeff Attached Images Last edited by jef5150; 08-10-2003 at 09:05 PM.

08-11-2003, 07:37 AM	#11
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,769	I'm rewireing my truck as we speak. These are the pic's so far. new fuse box as seen though the hole for the inst. cluster Main dash feed from fuse box.routed up and over opening that gauge cluster fit in.Looking at light switch. The view back to the center of the dash.Wires going to heater switch I'll be takeing pic's of the connections at the fuse box in the A.M.(Monday)The A/C/heater wire loom connects to the "CIG" and "IGN UNFUSED" terminals.I can't remember the color of wires that connects where though.I will post those pics in the a.m. __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

08-11-2003, 07:22 PM	#12
1970blazin Blazerless:-( Join Date: Jun 2003 Location: Olympia WA Posts: 1,612	tHANKS! Thanks BobbyK- that is what I was lookin' for- I am just trying to clean up all the loose wires and get rid of what I don't need. Keep em coming! __________________ 1970blazin 1970 CST Blazer-Orig. Dark Blue-SOLD Progress Pics of Blazer for sale

08-11-2003, 07:59 PM	#13
rickspickuppart Account Suspended Join Date: Jul 2003 Posts: 1,284	I have the service manuals for 25.00 plus ship pm me if interested (and I need to know the year they are different)

08-11-2003, 09:39 PM	#14
1970blazin Blazerless:-( Join Date: Jun 2003 Location: Olympia WA Posts: 1,612	This is what I am dealing with-Whew! Not looking forward to it! Attached Images __________________ 1970blazin 1970 CST Blazer-Orig. Dark Blue-SOLD Progress Pics of Blazer for sale

08-12-2003, 04:38 AM	#15
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,769	Ya that's the rat's nest I had under my dash as well. I took evrything out from under the dash.The wiring and ducting (both the soft tubing and the formed duct-work) It makes it ALOT easier to get under the dash to re-route the wires. Click here to see the pic's of the my rewire job.The album also includes pic's of the rebuilding of the A/C system and ductwork.It' not done yet but you can see the pic's I have so far. __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

08-07-2017, 10:29 PM	#17
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,703	Re: Wires under dash-pic or diagram??? That's the horn relay. some of them were mounted over by the steering column. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.



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