That'd be a good alternate title for the website: "Things that I have done that are probably done incorrectly".
Realized last time that I don't have a wire for the tach, also that I don't have the "you're in cruise" wire (referenced halfway down here)
Well, the wiring diagrams helped; they let me know that the tach wire goes from the PCM as circuit 121, Red #10 not to the dash -- that comes over the serial data - but to the traction control (which I don't have), and that the "cruise active" wire is PCM circuit 85, going to pin Red #13. Both wires are white and are pins F and G in connector C105.
|Well, we have to start by removing this fender. I'll have to do some cleanup to try to get it to fit better anyway.|
|Here we have C105. I only have one of these wires - the tach wire to the traction control.|
So I can just remove it from C105, go from the PCM directly to a wire
heading into the cab.|
I tried a weatherpak connector and made what looked like outstanding crimps. They weren't outstanding; no continuity between the weatherpak pin and the PCM pin 10. Also no continuity between it and PCM pin 13... and when I went to pull it back apart, the weatherpak pin just pulled right off.
And then I realized that what I had was not the tach wire, it was the cruise enable, and I'd cut the C105 pin off.
So - where is the tach wire from the PCM going, and what am I going to do about the cruise-is-on light wire?
As it sits here, I have pin 10 of the PCM (Tach out) connected to apparently nothing, and pin 13 (Cruise Indicator in) (not really) connected to a wire headed towards the cab. Quick fix: de-pin the PCM for both, so pin 10 is to the tach wire.
|You can vaguely see the grommet and the wires.|
|The better seal on the inside still wouldn't be sufficient.|
|Of course, as part of this, I had to unwrap the wires. Again. Really would have preferred to not do this.|
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