The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-27-2004, 08:31 PM   #1
FRENCHBLUE72
PROJECT 7DEUCE
 
FRENCHBLUE72's Avatar
 
Join Date: Dec 2002
Location: GRANTS PASS OR
Posts: 21,606
What are these???

Like the title says what are these doo dads located in the upper firewall area???
Attached Images
 
__________________
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..
FRENCHBLUE72 is offline   Reply With Quote
Old 11-27-2004, 08:33 PM   #2
Sweet72
Registered User
 
Sweet72's Avatar
 
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
Horn relay, and TCS time delay relay.
__________________
'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.
Sweet72 is offline   Reply With Quote
Old 11-27-2004, 09:58 PM   #3
68w/sbc406
Got Light Emitting Diode?
 
68w/sbc406's Avatar
 
Join Date: Apr 2004
Location: Newberg, OR
Posts: 2,485
Quote:
Originally Posted by Sweet72
Horn relay, and TCS time delay relay.
i know what SWB means but what is a TCS time delay relay ??? Traction Ccontrol Sensor
__________________
1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags

'02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car)

1993 Cherokee work ride/weekend wheeler
68w/sbc406 is offline   Reply With Quote
Old 11-27-2004, 10:09 PM   #4
FRENCHBLUE72
PROJECT 7DEUCE
 
FRENCHBLUE72's Avatar
 
Join Date: Dec 2002
Location: GRANTS PASS OR
Posts: 21,606
I will take a shot with turnsignal controll switch or turnsignal cancelling switch..
__________________
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..
FRENCHBLUE72 is offline   Reply With Quote
Old 11-27-2004, 10:15 PM   #5
jamis
F.A.S.T. president
 
jamis's Avatar
 
Join Date: Sep 2003
Location: Florida
Posts: 1,883
Electro-magnetic multiplex demodulator for the 64-megahertz sound wave generator circuit and its counter part for the forward light duplicating night guidance system. Also know in some parts of this world as a horn and/or head light relay....or none of these....I dont think I'm helping in any way so I must say goodnight
__________________
F.A.S.T. President and Founder
Fabricators for the Advancement of Sawsall Technology


"A fear of the Sawsall is a sign of retarded sexual and emotional maturity." ~Sigmund Freud, "General Introduction to Psychoanalysis"
jamis is offline   Reply With Quote
Old 11-27-2004, 10:27 PM   #6
neonlarry
Registered User
 
neonlarry's Avatar
 
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,745
Transmission Controlled Spark. The relay controls power to the vacuum solenoid on the right side of the intake manifold by the carb.
__________________
70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights
99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs
95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI
neonlarry is offline   Reply With Quote
Old 11-27-2004, 10:32 PM   #7
glock35ipsc
Next project: 1970 K10
 
glock35ipsc's Avatar
 
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,684
Were they on the inside or under the hood? If under the dash on the firewall, it's a horn relay.

If on the firewall under the hood.....well, I still haven't figured that one out yet. On my 70 K10, it had one ignition-on wire running to it (pink), and 4 wires running out. Two went to an A/C compressor type connector (blue/black), one red with a spade, and I can't remember the other one. Regardless, the thing had only one input wire to it, the pinkl one. And that was originally tapped off of the radio power wire.
__________________
Bob

1970 Chevy K10 LWB "Goldie" 350/TH350 next project!!
1981 Chevy C10 LWB 355/TH350 - My son's truck

LS SWAP FORUM! Tons of LS swap info here!
PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET!
CLICK HERE FOR THE FAQ INDEX by KRUE
glock35ipsc is offline   Reply With Quote
Old 11-28-2004, 12:28 AM   #8
FRENCHBLUE72
PROJECT 7DEUCE
 
FRENCHBLUE72's Avatar
 
Join Date: Dec 2002
Location: GRANTS PASS OR
Posts: 21,606
So on a new wiring harness are these part of the system still or do you unbolt and throw these items away? Glock bot units are inside the cab..
__________________
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..
FRENCHBLUE72 is offline   Reply With Quote
Old 11-28-2004, 12:52 AM   #9
Harold Shepard
Registered User
 
Join Date: May 2004
Location: Canton North Carolina
Posts: 466
They are th transister control spark relays- when you order your new harness you need to specify if you want to keep it (depends on if the solinoid is still attached to the pass. side intake manifold. It should have a plug that looks like A/c plug -2 flats and nipplies for vaccumn on each end. Hope this helps.
Harold Shepard is offline   Reply With Quote
Old 11-28-2004, 12:54 AM   #10
FRENCHBLUE72
PROJECT 7DEUCE
 
FRENCHBLUE72's Avatar
 
Join Date: Dec 2002
Location: GRANTS PASS OR
Posts: 21,606
I swapped in a 454-th400 combo and will order a new harness for that set-up from what I understand I can remove and throw away these two items correct?
__________________
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..
FRENCHBLUE72 is offline   Reply With Quote
Old 11-28-2004, 01:01 AM   #11
Harold Shepard
Registered User
 
Join Date: May 2004
Location: Canton North Carolina
Posts: 466
trash them
Harold Shepard is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:01 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com