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10-08-2011, 07:57 AM
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#1 |
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Registered User
Join Date: Aug 2010
Location: Fredericksburg, VA
Posts: 14
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wiring assistance
For the past year I have been slowly putting my 71 Blazer back together and I am now at the point where I am running a peerless wiring kit, but have run into an issue. I have these two relays (?) on the drivers side firewall behind the brake booster that I cant identify and don't seem to have any left over wires to run to them. Can anyone tell me what these are and let me know if I missed a step somewhere? Thanks
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10-08-2011, 05:22 PM
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#2 |
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People know me
Join Date: Jun 2007
Location: Hermiston, oregon
Posts: 840
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Re: wiring assistance
One is the horn relay, Not sure about the other
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1972 k/5 blazer CST 4X4 Crate 350, th350/205, dana44with trac-loc/14 bolt with detroit locker, 4 wheel discs 4.56s, 8" suspension lift using 73-87springs, 1" zerorate custom front crossmember, HAD CV drivelines and driveshaft e-brake, full cage, PRP seats, Full autometer gauges, 38x14.5x16 Toyo M/Ts, 16x10 Polished aluminum rockcrusher wheels 1967 longbox 4x4, Strong 400/400/208, 44/12bolt 4.10s, 6" lift, 35" Toyo M/Ts on corvette rally wheels |
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10-08-2011, 06:11 PM
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#3 |
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Registered User
 
Join Date: Oct 2009
Location: Phoenix, AZ
Posts: 475
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Re: wiring assistance
I believe they are part of the TCS (Transmission Controlled Spark) system. This was an emission control system that somehow limited the spark advance unless the trans was in high gear (I think). The harness connects to the transmission and to a vacuum actuator by the carburetor. Most people seem to have removed all this.
I don't think it's the horn relay - that's on the inside of the cab.
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1971 C10 Longbed, 350/TH350 |
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10-09-2011, 06:49 AM
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#4 |
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Registered User
Join Date: Aug 2010
Location: Fredericksburg, VA
Posts: 14
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Re: wiring assistance
Sounds good. I will remove them and see what happens. Thanks for the help.
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