Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
|
02-27-2013, 09:27 PM | #1 |
Registered User
Join Date: Aug 2009
Location: St. Paul MN.
Posts: 1,996
|
Anybody know what this is for ?
I am going through my original wiring harness on my 71 chevy c10 350 3 speed manual trans has no ac, ps, pb I ran across this wire that is dark brown in color that comes out of the bulkhead and was in the firewall gutter and not used. It is key on fed and the wire is only 12 inches long and will not reach the engine at all. I have looked at the wiring diagram and in the bulkhead there is only 1 brown wire that is for the voltage regulator and this is about 5 feet short. Any ideas I really would just like to know what it is used for. Here is a pic of the wire and the plastic connector. Thank You
__________________
Fuzzy |
02-27-2013, 09:51 PM | #2 |
RAT1968 '68 Cab/'71 Parts
Join Date: Feb 2002
Location: Coarsegold, CA
Posts: 2,375
|
Re: Anybody know what this is for ?
Don't take this one to the bank, but I think that's the juice for a tranny kick-down. I had an extra brown with that connector
on my original harness. And the fresh M & H harness has one, too. I just let it "dangle" in a safe place and called it good.
__________________
M17 Coarsegold, CA RAT's shiny now. But always a rat. |
02-27-2013, 09:54 PM | #3 |
Senior Member
Join Date: Dec 2011
Location: Laurel, Mt.
Posts: 522
|
Re: Anybody know what this is for ?
I actually think that's for the TCS harness, it plugs into it
Posted via Mobile Device
__________________
1972 Cheyenne Super 10 SWB,bucket seats,dealer cruise,tilt,tac,a/c,shoulder belts, 350/350 1971 K-10 Custom Deluxe 1971 K-10 Custom |
02-27-2013, 09:59 PM | #4 |
RAT1968 '68 Cab/'71 Parts
Join Date: Feb 2002
Location: Coarsegold, CA
Posts: 2,375
|
Re: Anybody know what this is for ?
Cool. I have absolutely *no idea* what a TCS is.
__________________
M17 Coarsegold, CA RAT's shiny now. But always a rat. |
02-27-2013, 10:05 PM | #5 |
Senior Member
Join Date: Dec 2011
Location: Laurel, Mt.
Posts: 522
|
Re: Anybody know what this is for ?
Transmission controlled spark. The harness itself plugs into the trans, a temp sensor on the pass. side of the engine, a idle solenoid on the carb and two relays on the firewall above the emergency brake on the outside in 71 and the inside in 72. Most guys throw um away
Posted via Mobile Device
__________________
1972 Cheyenne Super 10 SWB,bucket seats,dealer cruise,tilt,tac,a/c,shoulder belts, 350/350 1971 K-10 Custom Deluxe 1971 K-10 Custom |
02-27-2013, 10:15 PM | #6 |
Registered User
Join Date: Apr 2012
Location: Henderson Nevada
Posts: 804
|
Re: Anybody know what this is for ?
My first thought was it goes to the brake porportion valve being so short?
|
02-28-2013, 12:46 AM | #7 |
Registered User
Join Date: Jul 2010
Location: Whittier Ca
Posts: 172
|
Re: Anybody know what this is for ?
Mine is dangling free also. The last 42 yrs
__________________
Ed F 1972 Sierra Grande White Top Medium Olive 402 bb / Camper Stock, Loaded, Straight & Aged Nicely, No Tilt Original Resto would be nice $ |
02-28-2013, 07:02 AM | #8 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
|
Re: Anybody know what this is for ?
How does REF ACC FEED sound to everyone? What wiring diagrams did you use the generics or the 71 service manual's?
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
02-28-2013, 05:22 PM | #9 |
Registered User
Join Date: May 2011
Location: Missoula, MT
Posts: 934
|
Re: Anybody know what this is for ?
Tim, what is the REF ACC FEED?
__________________
69 GMC C10 build thread- http://67-72chevytrucks.com/vboard/s...d.php?t=501676 03 Silverado build thread-http://67-72chevytrucks.com/vboard/s...d.php?t=591582 |
02-28-2013, 05:45 PM | #10 | |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
|
Re: Anybody know what this is for ?
Quote:
Actually I had not noticed it before nor seen if referenced. From the description it is an underhood igniton voltage reference power connector for testing that can also be used for an underhood accessory feed.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
|
02-28-2013, 11:30 AM | #11 |
Registered User
Join Date: Jul 2012
Location: Ft Wayne Indiana
Posts: 1,204
|
Re: Anybody know what this is for ?
My '71 has the same wire as well, I posed a topic on the forum quite some time ago and I think we all came to the conclusion it was for the TCS. Like said above, it's usually thrown away as it is just emission crap that makes the truck run poorly when it is not warmed up, if I recall.
__________________
71 K20 64 GMC mud truck |
02-28-2013, 06:34 PM | #12 |
Registered User
Join Date: May 2011
Location: Missoula, MT
Posts: 934
|
Re: Anybody know what this is for ?
Thanks Tim! I personally find the wiring on these trucks to be interesting to say the least! My stock wiring harness has radio wires piggy backed off trans wires that are plugged into the radio fuse spade, who would have know they had anything in common.
__________________
69 GMC C10 build thread- http://67-72chevytrucks.com/vboard/s...d.php?t=501676 03 Silverado build thread-http://67-72chevytrucks.com/vboard/s...d.php?t=591582 |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|