Electrical gurus - help rewiring clutch start cancel switch

So in essence 2 Clutch Start switches...I would not recommend a cheesy switch to replace the function of the latching switch. I'm out.

 

Thanks @caribe makaira and @98tacoma27 for the explainers. This was a good chance to learn.

Best bet would be Toyota comes out with an OEM small in the future. Given the complexity and low volume, it makes sense that they stick with the old school tall for now. Custom mod is high LOE and low ROI for now. Maybe the best bet would be some sort of piggyback mechanical contraption where a small switch mechanically presses the large switch behind it via pushrod.

 

I believe the only thing the zenner diode is doing is allowing the light and the small coil to stay on via the base of the transistor. Since the CSC switch is momentary.

you could have a much easier implementation with a relay rather than hacking the switch. Sorry for the crude drawing. Welcome feed back if I didn’t put wires in the right place in my head.

 

Whoa! So if I tossed in a latching switch and T'ed into Beige and Yellow, I'd get a live starter?

 

Just the typical 3A.

Given the use, I was looking at these:
https://www.aironboard.com/online/p...ment-press-to-turn-on-something-led-blue.html

https://www.aironboard.com/online/p...ota-oem-replacement-plain-cover-blue-led.html


They appear to be latching. I will see if I can get a current measurement for the CSC switch.

 

@tonered I got a set of 7 or 8 different relays, new, for $1 when I got my high current relay. Happy to send you one for this purpose. Some are small-size. I assume they would all handle 5A just fine.

@Rownan could you post a bigger image/photo of the switch you got? Looks like a gargoyle to me in your first post. I kinda want to see what's going on there.

 

Thanks, David. But, I do have some relays laying around also. I am not sure if I will dig in that far.

This would be one of their momentary (non-latching) switches, just in case I have the terminology messed up.

https://www.aironboard.com/online/p...-replacement-air-horn-momentary-led-blue.html


In my mind, I would want to be able to leave this switch On for long periods. Just have a live clutch all the time.

 

A "Clutch start bypass" bypass switch, if you will? Bypass the bypass. Maybe we can get a faceplate with something like this?

 

How about just a couple wire nuts with some bare whiskers showing?

 

Thanks for the explanation. I get my issue on the terms.

Like I noted earlier in the thread, I have had some vehicles with a live starter and it was a very nice thing overall. Some came that way from the factory. I had not experienced any issues. Just kinda miss it, mainly cold starts in neutral.

The funny part is that I have yet to use it as Toyota intended. I have used it a few times on my bikes to either roll them up a trailer or off to the side of the road and the one time that I cracked off the clutch lever. Very handy!

 

So, merging with the other AT to MT thread on topic a bit, would it be potentially possible to:

1. Add a meso start button and OEM trim panel to an existing MT so it looks just like AT PTS + 4x4 + climate controls.
2. Wire meso start button to fire both ignition and clutch start cancel via DPDT relay

Thus achieving some of the look and feel of PTS without significant changes to wiring and such? Not quite as slick as you'd still need the key in the ignition and turned to on but you could do that with one hand then hit the button with the same hand, no need for two hands with one on the button and no reason to keep the OEM CTC switch directly accessible (stuff it behind the driver's side cubby).

 

Hey sorry for the wait. Is this what you're thinking of, or you want to see the OEM switch?

 

I have the t-taps ready to go, just waiting on a relay to arrive due to the ch4x4 switch only able to handle 3a. I might end up wiring this up tomorrow.

 

cool. Funky. Different than I’ve seen before.

 

Alright so I have the relay now, and I'm planning to wire in this ch4x4 on/off switch. This is what I'm thinking. Wrong on any part?

Pin 30 to beige
Pin 87 to yellow
Pin 86 to red 1 on ch4x4 switch
Pin 85 to chassis ground
Pin 87a unused

On ch4x4 switch
Green to pink (IGN)
Red 2 and black tap illumination wires

 

I just wired it up as shown and it works exactly how I want it to. Woohoo thanks all for the help here.


Now to pretty it up a little.