Mystery wire... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

farside847 · 07-25-2005, 11:48 AM

I was rolling arround under my truck yesterday (so much fun) looking for a oil leak when I saw a wire that was not connected. It came right down to the transmission (I have a 3 on the tree) and looks like it should connect right next to the engine side linkage bolt. I would have taken a pic but it would be too close to focus.

At first I thought it might be for the backup lights, but then I remembered that the backup lights are controlled by a switch on the colum, and the backup lights work even though this wire is broken off.

Any ideas?

**CPNE** · 07-25-2005, 11:59 AM

Goes to TCS switch (transmission controlled spark). Early emmissions control system. In essence:

An emissions-control system to prevent distributor vacuum advance at normal operating temperature until the transmission has shifted into high gear by using a transmission-mounted electric switch controlling a solenoid-actuated vacuum valve.

farside847 · 07-25-2005, 12:12 PM

Whoah. That was a bit over my head. But I think I get the gist. Emission thingy. Will it hurt to leave it off? Or does it make the engine run less efficient?

**CPNE** · 07-25-2005, 12:21 PM

Ahhh, so its you that's responsible for this summer's heat wave. Fix that wire dammit

Seriously, if your social concious allows it, leave it alone, your truck will be fine...though the rest of us may suffer.

ckhd · 07-25-2005, 01:31 PM

CPNE, is it my imagination, or has Boz-all gotten uglier?

**CPNE** · 07-25-2005, 01:58 PM

Quote:

Originally Posted by ckhd

CPNE, is it my imagination, or has Boz-all gotten uglier?

yes, he's evolved into something more evil

07-25-2005, 11:48 AM	#1
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	Mystery wire... I was rolling arround under my truck yesterday (so much fun) looking for a oil leak when I saw a wire that was not connected. It came right down to the transmission (I have a 3 on the tree) and looks like it should connect right next to the engine side linkage bolt. I would have taken a pic but it would be too close to focus. At first I thought it might be for the backup lights, but then I remembered that the backup lights are controlled by a switch on the colum, and the backup lights work even though this wire is broken off. Any ideas? __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree

07-25-2005, 11:59 AM	#2
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	Goes to TCS switch (transmission controlled spark). Early emmissions control system. In essence: An emissions-control system to prevent distributor vacuum advance at normal operating temperature until the transmission has shifted into high gear by using a transmission-mounted electric switch controlling a solenoid-actuated vacuum valve. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all Last edited by CPNE; 07-25-2005 at 12:05 PM. Reason: added more info cause I'm a nice guy

07-25-2005, 12:12 PM	#3
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	Whoah. That was a bit over my head. But I think I get the gist. Emission thingy. Will it hurt to leave it off? Or does it make the engine run less efficient? __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree

07-25-2005, 12:21 PM	#4
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	Ahhh, so its you that's responsible for this summer's heat wave. Fix that wire dammit Seriously, if your social concious allows it, leave it alone, your truck will be fine...though the rest of us may suffer. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

07-25-2005, 01:31 PM	#5
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	CPNE, is it my imagination, or has Boz-all gotten uglier? __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?



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