4wd indicator light switch - Page 2 - JeepForum.com
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post #16 of 38 Old 02-02-2020, 01:16 PM
Boojo35
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Quote:
Originally Posted by Chrisnvegas View Post
If anything happens to the firewall switch, scrap it and ebay a CAD switch that mounts to the axle. Extend the wire. The switch works as a ground for the dash light.
Pulling the dash bezel to inspect the light bulbs need not be scary. You aren't taking the dash apart, just removing a light weight bezel from the front.
I am bittersweet about your response, Chris.

Sweet as to you helping others repair this easily...

Bitter as to it is a challenge on the 87 to make it original.

LOL.

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If you cannot fix it with a hammer then it has to be an electrical problem.
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post #17 of 38 Old 02-02-2020, 02:12 PM
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Quote:
Originally Posted by Boojo35 View Post
I am bittersweet about your response, Chris.

Sweet as to you helping others repair this easily...

Bitter as to it is a challenge on the 87 to make it original.

LOL.
The newer design is better, instead of a vacuum signal operating the 4WD light, the actuator in the axle turns on the light. If the light is on, chances are the 4WD is working vs the system has vacuum, who knows about the rest.

I don't mind doing hidden improvements, I do always keep the old parts though.

"Alferd Packer: “Stand up, you voracious, man-eating son of a *****, stand up! There was seven democrats in Hinsdale County and you up and ate five of them."
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post #18 of 38 Old 02-02-2020, 02:35 PM
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Quote:
Originally Posted by manosr View Post
I will check the bulb, what's the worst that can happen?
My issue remains: I'd like to find a vac firewall 4WD indicator switch, new. I don't know how...and believe me I have googled a lot...
(BTW thanks for all the replies!)
Besides used salvage, you probably aren't going to find an original switch.
Those original switches did not last. That's why they were replaced with the axle switch after a couple years.
If you don't want to do the axle switch mod, there are vacuum switches out there. I found one a few years ago. It's a simple on/off switch operated by vacuum.

If searching I would probably type "12 volt vacuum sensing switch"
or something like that.

"Alferd Packer: “Stand up, you voracious, man-eating son of a *****, stand up! There was seven democrats in Hinsdale County and you up and ate five of them."
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post #19 of 38 Old 02-02-2020, 03:10 PM
Boojo35
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Quote:
Originally Posted by Chrisnvegas View Post
The newer design is better, instead of a vacuum signal operating the 4WD light, the actuator in the axle turns on the light. If the light is on, chances are the 4WD is working vs the system has vacuum, who knows about the rest.

I don't mind doing hidden improvements, I do always keep the old parts though.
Did you forget which Jeep we are talking about? The switch is still there and probably still works. Just one of those things that needs to be sorted out. One of the wires is missing and so is the vacuum hookup. Of course I realize which system is better and easier. I don,t need a light to tell if I am really in 4WD, all you have to do is make one tight steering manuever. JS..

i don't mind hidden improvements in this Jeep but as you know, it doesn't need hidden improvements in many cases. just research. You definitely know this as well as I do. You are familiar with its condition.
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If you cannot fix it with a hammer then it has to be an electrical problem.
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post #20 of 38 Old 02-02-2020, 03:31 PM
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I think the cad mount light switch is nice to have.
I’ve always poo-pooed 4by lights but the actuator plunger switch is a tool - like chris said- that actually can tell you something useful.

[size=“3”]Shackles & D-rings are different things.
Cranking IS turning over
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post #21 of 38 Old 02-02-2020, 04:01 PM
Chrisnvegas
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Quote:
Originally Posted by Boojo35 View Post
Did you forget which Jeep we are talking about? The switch is still there and probably still works. Just one of those things that needs to be sorted out. One of the wires is missing and so is the vacuum hookup. Of course I realize which system is better and easier. I don,t need a light to tell if I am really in 4WD, all you have to do is make one tight steering manuever. JS..

i don't mind hidden improvements in this Jeep but as you know, it doesn't need hidden improvements in many cases. just research. You definitely know this as well as I do. You are familiar with its condition.
The arrow straight Nevada roads give little indication if 4WD is engaged. I have driven 50 miles on a dry paved road in 4WD... and that's with a working light.

yeah, I know the condition.
Summer is on it's way.

"Alferd Packer: “Stand up, you voracious, man-eating son of a *****, stand up! There was seven democrats in Hinsdale County and you up and ate five of them."
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post #22 of 38 Old 02-03-2020, 11:58 AM
manosr
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I support 100% originality when restoring a car, but this one makes my life very difficult. Not just the switch, the whole car! Everything is connected as it should and I will fix it eventually. "12 volt vacuum sensing switch" was spot on!
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post #23 of 38 Old 02-03-2020, 02:48 PM
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Quote:
Originally Posted by manosr View Post
I will check the bulb, what's the worst that can happen?
My issue remains: I'd like to find a vac firewall 4WD indicator switch, new. I don't know how...and believe me I have googled a lot...
(BTW thanks for all the replies!)
Wish I would have seen this earlier! I just scrapped mine last weekend...
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post #24 of 38 Old 02-04-2020, 01:13 PM
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Wish I would have seen this earlier! I just scrapped mine last weekend...
Damn! Thank you anyway...
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post #25 of 38 Old 02-04-2020, 01:41 PM
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I may have my 'old' one laying around from when I removed it to install a TJ switch since the 89 had hubs.

See pic here, don't know if it works...

https://www.jeepforum.com/forum/f12/.../#post39600778


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post #26 of 38 Old 07-31-2020, 04:43 PM
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(Skip ahead two posts)

Okay... revisit the revisit! My dash light works and my vacuum switch works, but when I got it there was no line attached to down in the loom on the fender. Is it supposed to get it's actuating vacuum from somewhere in particular? Or any source of vacuum? (I hooked it up where I though it went and it didn't work. I hooked it up somewhere else and it was on all the time, though I didn't play with it there very long)

Last edited by cas6969; 08-01-2020 at 07:17 AM.
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post #27 of 38 Old 07-31-2020, 05:01 PM
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Last edited by cas6969; 08-01-2020 at 07:24 AM. Reason: Removed question.
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post #28 of 38 Old 07-31-2020, 06:02 PM
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So my Yellow from #4 was running right into the vac storage tank. Got that where it needs to go.

My red line from the VCS was connected in a loop to the blue line from the VCS. (???)

So my most recent question is.... where does the blue/vent go after the #3 air vent filter? Does it attach to anything or just float in space?

Last edited by cas6969; 08-01-2020 at 08:40 AM. Reason: Clean up edit, new questions.
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post #29 of 38 Old 08-02-2020, 05:36 AM
manosr
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It is not connected to anything. Just a vent line.
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post #30 of 38 Old 08-03-2020, 07:38 PM
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Maybe I'm just thinking out loud or someone can throw something out I'm not "seeing".

I'm now set up like the diagram.
My light works.
My vac switch works.
My 4WD works.
But my 4WD light doesn't work in 4WD.

I have 4WD, so the Vacuum shift motor must be working. In turn, the vacuum control switch must be too? (Yes, No?)

My desire to solve the puzzle is stronger than my actual need of the light. lol
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