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#1 |
Account Suspended
Join Date: Aug 2006
Location: vacaville ca, because it as far from indy as i can be
Posts: 777
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wtf are these and no headlights
these are on the upper right hand corner of the fire wall. they were wired in with the externaly reg alt harness. i redid my wiring today to mod and move the alt to intr reg and the p-side of the motor.
instead of looping the external reg plug, i eliminated it. i used a small alt harness for a 73+ that had the main power, ext excitor, and the brown wire back to the fire wall, it is charging the batt and powering everything but the headlights. i dont think they are related but ??????????? |
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#2 |
Registered User
Join Date: Dec 2003
Location: here
Posts: 5,789
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Re: wtf are these and no headlights
My 69 doesnt have either of them. I cant help you...
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#3 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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Re: wtf are these and no headlights
Those are for the TCS(Transmission Controlled Spark)...it's an emmisions thing.
They're relays. I had a pair in that exact same area of the firewall of my 71 Blazer. Still had the wiring too...just no TCS solenoid on the carb.
__________________
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 |
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#4 |
Registered User
![]() Join Date: Feb 2004
Location: Idaho
Posts: 4,034
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Re: wtf are these and no headlights
No Help Here Either
__________________
"Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!" |
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#5 |
Registered User
Join Date: Mar 2006
Location: Cypres, Texas
Posts: 3
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Re: wtf are these and no headlights
They are to engage the A/C compressor when you turn off the engine.
To keep the engine from dieseling. My friends 71 Cheyenne has it. It's an option listed on the option sheet can't remember how they list it though. |
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#6 |
Registered User
![]() Join Date: Feb 2004
Location: Idaho
Posts: 4,034
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Re: wtf are these and no headlights
Pics man Pics,
Please
__________________
"Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!" |
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#7 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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Re: wtf are these and no headlights
I thought that A/C relay was located under the dash?
__________________
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 |
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#8 |
Account Suspended
Join Date: Aug 2006
Location: vacaville ca, because it as far from indy as i can be
Posts: 777
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Re: wtf are these and no headlights
no a/c cab. heater only.
the carb thing ??? i didnt find any stray unidentified connectors, so???????? the harness that hooked to them all seemed to be alt related. do you have any pics of how it connected to the carb or even dia. that lists them??? i also belive i found that the lights are dead due to a bad high beam switch, i could only get power out of one of the 3 prongs . |
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#9 |
Account Suspended
Join Date: Aug 2006
Location: vacaville ca, because it as far from indy as i can be
Posts: 777
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Re: wtf are these and no headlights
well the no head lights was cured with a new dimmer switch today.
thanks anyways |
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#10 |
member #16
![]() Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: wtf are these and no headlights
The TCS had a solenoid on the carb that controlled the vacuum advance through a signal from trans and a temp switch so you only had vacuum advance in high gear after the engine warmed up .
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors ![]() http://www.flickr.com/photos/1745471...7602865984234/ |
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#11 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: wtf are these and no headlights
1relay goes to a tranny control the other to a carb solenoid both are for emissions both are useless both are listed on the 71 factory wire diagram in your 71factory service manual
__________________
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 |
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