where is the best place to tie in the black with white tracer for the amp reading? the Tan wire in my group of four needs to just be spliced back to the wire running down the frame instead of going to the solenoid because it is running from the harness correct
CK5
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1975 K5 wiring
- Thread starter Sleblanc
- Start date
Hmm, why do I see two red wires going to the bulkhead?
three wires coming into the junction harness the violet the tan and the black. also if you see this black with white stripe it is cut i do not know what it runs to any suggestions?
I think the stud junction on the firewall.
one is going to the HEI and one is going into the alt wires
the tan will just run down with the other wires and i will butt splice it and let it run to the tank correct no need to hook it to the start solenoid?
Also the alt has two reds and a dark colored wire running from it.
black wire coming off the solenoid that i can not seem to see what it goes to. it was cut.
I have bad news, that is the stud that you have hook up the violet wire. That is the "S" terminal. The main stud don't look to good. You may have to pull the starter anyway. Ditch that black wire.
That sound right.
Yes, the tan wire does not hook to the solenoid. It goes to the tank.
awesome thank you so much tonight man. i know this one is much simpler to work on then my other rigs but they had stuff so messed up i got a butt splice and heat shrink on almost every wire it seems. i guess a new harness will be in my future when i start rebuilding this thing
Hmm, GM must have changed the color code a little. The dark color wire if cleaned should be brown. The red wire that leads to the fusible link at the junction stud is charge wire. The other red wire must be the sense. GM must of figured to change the wire colors for same circuit was pointless. My point is all the red wires all hook together at some point. Except for the one leading to the HEI. The later model GMs, the ignition wires where pink.
There may be another black wire with white tracer going to the wipers, but it looks like the harness to the wipers is untouched. Why mess with it?
I do know there is black wire, and a black with white tracer that goes to the amp gauge.
Now that think about it, one of those red wires look a little light. Could it be the pink ignition wire?
roger i agree one looks a little tinted different under direct light. of course i grabbed the wrong size loom to put back on this thing so i may have to wait and try to start her in the morning after a quick run to the auto parts store.
on this metal tube that looks like it was used to secure the wires away from the manifolds where does it bolt up ( has a small tab to screw to something) or should i remove it and wire loom all the way through?
on this metal tube that looks like it was used to secure the wires away from the manifolds where does it bolt up ( has a small tab to screw to something) or should i remove it and wire loom all the way through?
On my trucks I moved the the red wire that goes under the positive battery cable at the solenoid (some years had two red wires with fusible links there)--and I routed them up and back to the battery positive right at the battery--I eliminated that metal conduit pipe the wires ran through because I've had the wires roast in that tube on more than one truck,and it makes replacing the fusible links a real pain..having them up along the inner fender makes it easy to inspect and repair the wires and fuse links if need be..and now at the solenoid,all you'll have is the positive battery cable,and the purple "crank" wire going to the "S" terminal on the solenoid...
I had to add a little 10 gauge "extention" to get the red wires to reach the battery,and connected them right to the positive terminal--all the pre-72 trucks were wired that way and it was a better arrangement IMO..
On the alternator in addition to the red wire that goes to the stud on the rear of it,the other two wires on the plug are usually one red one that goes to the #1 terminal on the alternator and stays hot constantly,the other is either tan,light brown or white,that one gets 12V only with the key "on" or "run" to energize the field coils so it'll charge..
I had to add a little 10 gauge "extention" to get the red wires to reach the battery,and connected them right to the positive terminal--all the pre-72 trucks were wired that way and it was a better arrangement IMO..
On the alternator in addition to the red wire that goes to the stud on the rear of it,the other two wires on the plug are usually one red one that goes to the #1 terminal on the alternator and stays hot constantly,the other is either tan,light brown or white,that one gets 12V only with the key "on" or "run" to energize the field coils so it'll charge..
the red wire from the post to the solenoid looked to originally have two reds spliced together. So if I move that one to the battery that leave me with a black and a violet going to the solenoid I guess I would have to move that black wire also.
I went through the whole harness last night fixing where they twisted and taped wires together luckily most wires still felt good and not brittle
I went through the whole harness last night fixing where they twisted and taped wires together luckily most wires still felt good and not brittle
No have the black wire follow the red wire.
I find it interesting 75 have the wire going along the back. 73/74 have the harness snake along the top, front, than the panrail. I knew gm ran the wires in the back sometime during the mid seventies, I just thought it was around 77.
I find it interesting 75 have the wire going along the back. 73/74 have the harness snake along the top, front, than the panrail. I knew gm ran the wires in the back sometime during the mid seventies, I just thought it was around 77.
so i finally was able to free up some time and able to work on what we have discussed i ran the battery to the starter big post the violet wire to the s post which i looked back and they had the violet wire on the opposite side of the s post which is weird. i also found where the mysterious black wire was ran from the s post to a grommet behind the master cylinder with what looks to be a metal line going through there and they spliced it into what looks like a purple witt white tracer 10-12g wire. Any ideas on what this would have accomplished? of course it was just stripped and wrapped around the purple and white.
