engine wiring harness
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 41
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engine wiring harness
Just replace engine wiring harness 73 small block no air automatic. Everything went well until I hit the starter. Replace the red purple and black ground fine.. the starter did not have the small yellow wire attached and the car has been starting fine..confused on attaching the yellow wire to the solenoid or leave it off as it was...any thoughts.
Thanks
Thanks
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
The yellow wire connects to "S" terminal...which stands for 'start'; the "R" terminal stands for 'run'. The other end of the yellow wire goes to the + terminal on the coil together with the resistance wire coming from the fuse panel. The "S" terminal is only powered during start-up and has a full 12 volts on it. That is what is intended to feed the coil when you start the car. Once you have released the key into the 'run' mode, the power for the coil comes from the resistance line which supplies a lower voltage and reduces load on the coil {regardless of what others try to tell you}. Right now, you are only feeding the coil with the resistance line. That is working now, but in cold weather or other stressed condition, your engine might have trouble firing without a full 12 volts to the coil. Just attach that line to the "S" terminal on the starter solenoid.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 41
Likes: 0
thanks for all the replies. what i am trying to figure out is that since i have had the car it has been starting fine with the yellow wire disconnected. now that i've replaced the engine wiring harness I am wondering if i should attach the new yellow wire or leave it off as it was. could there have been some reason the previous bubba disconnected it. this bubba does not want to make it worse.
Le Mans Master
Joined: Aug 2006
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Likes: 1,554
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Yes! Hook up the yellow wire.
The yellow wire connects to "S" terminal...which stands for 'start'; the "R" terminal stands for 'run'. The other end of the yellow wire goes to the + terminal on the coil together with the resistance wire coming from the fuse panel. The "S" terminal is only powered during start-up and has a full 12 volts on it. That is what is intended to feed the coil when you start the car. Once you have released the key into the 'run' mode, the power for the coil comes from the resistance line which supplies a lower voltage and reduces load on the coil {regardless of what others try to tell you}. Right now, you are only feeding the coil with the resistance line. That is working now, but in cold weather or other stressed condition, your engine might have trouble firing without a full 12 volts to the coil. Just attach that line to the "S" terminal on the starter solenoid.
Yes! Hook up the yellow wire.
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