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11-09-2013, 03:51 PM
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#1 |
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Registered User
Join Date: Oct 2012
Location: Chicago, IL
Posts: 26
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71 C10 wiring question
I have a 71 C10 w 250. I just freshened up the top end, and im adding an hei. I found 4 wires clipped off, they all go to this relay above and right of the terminal block. I don't see them on the wiring diagram. What is this?
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11-09-2013, 05:41 PM
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#2 |
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Registered User
Join Date: Oct 2012
Location: Chicago, IL
Posts: 26
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Re: 71 C10 wiring question
Anyone know what this relay is? Obviously its not something that affects my truck running. I pulled it all out. I just want to know what it is.
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11-09-2013, 05:48 PM
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#3 |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,147
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Re: 71 C10 wiring question
With out a picture its hard to tell.
I'll take a guess though, a flux capacitor?
__________________
1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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11-09-2013, 07:06 PM
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#4 |
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Msgt USAF Ret
  
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,718
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Re: 71 C10 wiring question
This is the TCS relay, see if the wires match the picture. The upper relay is the horn relay. The TCS is a poor attempt at emissions on the 71 and 72 years. It stands for transmission controlled spark.
__________________
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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11-09-2013, 07:36 PM
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#5 |
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Registered User
Join Date: Oct 2012
Location: Chicago, IL
Posts: 26
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Re: 71 C10 wiring question
Thanks guys. I had a feeling it was emissions related. Sorry for no pic, couldn't figure out how to upload from my phone.
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11-09-2013, 10:48 PM
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#6 |
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Registered User
Join Date: Oct 2012
Location: Chicago, IL
Posts: 26
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Re: 71 C10 wiring question
the pic that shows the driver side of the firewall, the relay is there....I know you cant see it, but if you have a 67-72, im assuming that most/all have this thing there....
the other pic is of the motor close to run. if I have a few spare moments tonight, I can finish welding the radiator brackets and fire it up. |
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11-09-2013, 10:51 PM
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#7 |
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Registered User
Join Date: Oct 2012
Location: Chicago, IL
Posts: 26
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Re: 71 C10 wiring question
okay, I put a yellow circle around it. sorry for all the pics.
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11-09-2013, 10:53 PM
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#8 |
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Registered User
Join Date: Oct 2012
Location: Chicago, IL
Posts: 26
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Re: 71 C10 wiring question
Vette, I noticed my wires match yours. even though yours is in the cabin. ty!!
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