Given the condition of wiring, specifically the back of the truck, I figured I'd wait two days for the new switch before trying to jump the terminals. The white wire is ckt 17 but where in the truck is that terminal connection? I've only be able to separate them about 2 inches from each other by removing the center screw in the bulkhead and the corner screws on my fuse panel. How do I successfully remove my bulkhead connector and fuse panel? If I'm to check this, it invites the question I've been putting off for now. The bottom of the fuse is the hot side, meaning it's getting it's power from behind the fuse panel through the firewall from a 12gauge wire in ckt2 into the bulkhead. Your help allowed me to see it in my wiring diagram. What happened when you jumpered "white" to "orange?" Did the brake lamps illuminate? The white wire runs between the brake switch and the turn signal switch, and is similarly marked * at the turn switch. The white wire (Ckt 17) should measure 12 volts whenever the brake light switch plunger is extended (as when depressing the brake pedal). The "white" wire terminal of the brake light switch connector is marked *. So the lower end of the brake lamp fuse is the "hot" end. The B+ power bus in the fuse box that feeds the brake light fuse is labeled accordingly. The orange wire (Ckt 40) is constant B+ supplied from the brake lamp fuse.
* also marks the "orange" wire terminal of the brake light switch connector. The fuse that protects the brake lamp circuit is marked with *. The fuse box is illustrated from both the front and back sides. Pierce wire only when absolutely necessary. Rather than pierce the insulation, probe the terminal. I'm sure most, if not all this info is here on mud already, it may be just a matter of finding it.The test light you have is pretty common. With that said, with enough patience and a DMV/Ohm meter, you should be able to figure out each wire without taking it apart.īTW, I believe that the ignition switch is a separate connector and has 4 wires. I would take the plastic covers off the column, and remove the steering wheel, so it gives you a better idea how the wires are routed and therefore where the wires are going, like ignition switch, turn signal switch, etc. One thing I've noticed working on a few cruisers is that the color on the OEM schematic is generally showing you what color wire is being used in the OEM main wire loom only and when that wire runs to a connector, like on the steering column, the mating wire for that terminal could be a different color. It sounds like you don't have the OEM loom and are using a Painless harness. Just a bit of caution about the wire colors I listed above, those colors were from the schematic showing the color of the wire in the main loom. The GR (green/red stripe) could be the horn. WB (white with black stripe), I think, is only used for ground so that would be a good guess. I will do more searching and try and find it again.
Color chevy brake light switch wiring how to#
I do have a sketch of the electrical connections from another thread that I now can't find, showing the the connections in the turn positions, but the wire colors are not labeled, and I don't know how to read it. I have the wiring schematic, but it doesn't show the 2 or 6 position plugs or the pin out of the column like it does for the switches. With the lever in the center position, I get RY to RW (also in right AND left turn position)Ĭan anyone help with what wire color does what or how to test to see. With the left turn signal on I get GW to GB and RY to RW With the right turn signal on I get continuity with GY to GW adn RY to RW 1978 steering column wires and how they ring out. This is something I can't seem to find on this site, so hopefully I'll be the first, but not last to do this. I'm going to be asking questions and documenting every wire # and every switch wire color and when I'm done I will do a separate post and run down every connection I did so future members can just follow along. I'm going to start with the steering column and hazard switch in this thread, then do another thread about the others.
Color chevy brake light switch wiring install#
My plan is to write down every wire # (painless wire #) that goes to each switch wire, then install and hook up the wires. Long story short, I am so confused I can't see strait, and I haven't even started.
OK, so i got a set of 78 switches from another MUD user, and am now ready to start.
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