late style stock 24 volt light switch.

Bobber

When I turn the switch on I hear a springing sound, which I believe is the internal breaker being activated. Then the lights don't work, but every 20 seconds I hear the spring sound and the lights blink and volt Gage needle pulsate back and fourth once. I also read these switches were unserviceable.
Does this all sound like my switch is bad, just checking. Thanks
_________________
Rusty, 1952 M38, Koenig hard top.

4x4M38 · Posted: Fri Jul 01, 2016 1:41 pm Post subject:

Rusty,
It sounds like the breaker tripping. Age and abuse can damage the switch
as well as the breaker.

Bretto has taken his apart and refurbished the innards and bypassed
the breaker. Search the threads and you'll find it. I'd try that before I
chunked it.

I mean, you don't have anything to lose at this point, right?

Take care,
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

Bobber · Posted: Fri Jul 01, 2016 1:49 pm Post subject:

Thanks, I'll give it a try.
_________________
Rusty, 1952 M38, Koenig hard top.

4x4M38 · Posted: Fri Jul 01, 2016 7:35 pm Post subject:

Of course don't ignore the obvious.

You may have a short in the light circuit.

Just a question. Is your jeep 24 volts or 12?
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

wesk · Posted: Fri Jul 01, 2016 9:27 pm Post subject:

We have a case of 1st advice was preceded by 2nd advice. The switches are not very expensive.

1-Yes the switch has an internal circuit breaker.

2-When it persistantly pops then the FIRST step is to check your lighting circuits for a short or overload.

3-If you find a short or overload fix it and try the switch.

4-If you don't find a short or overload my advice is replace the switch. They are not that expensive.

5-If you still must play with the switch then the value of your time will dictate the wiseness of your choice. If you do eliminate the internal circuit breaker make sure you find another way to protect the circuit IE fuse or remote circuit breaker.
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

4x4M38 · Posted: Sat Jul 02, 2016 7:26 am Post subject:

Yep. Took me six hours to realize I left off first thing to check.

😳

Thanks Wes!
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

Bobber · Posted: Sat Jul 02, 2016 10:29 pm Post subject:

I checked each circuit breaker, then removed the light switch and started jumping the hot pin in the plug with a fused jumper and found two pins were shorted out. looked up the pin letter and it told me it was the brake light switch on the master cylinder. Removed it, tested it, then replaced it. Now it all works. The cycling of the circuit breaker had me a little confused, not ever dealing with those. That's why I thought it was a circuit breaker, but when I started moving the load wire from the circuit breaker to the other circuit breaker and the problem followed. Then I expanded my search. Thank you Gentlemen.
_________________
Rusty, 1952 M38, Koenig hard top.

wesk · Posted: Sat Jul 02, 2016 10:43 pm Post subject:

Were you able to locate these illustrations in my photo album?

Also this manual can be applied to the later switches:
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album190&op=modload&name=gallery&file=index&include=view_album.php

Just use this pinout:

Keep your eye open for any deals on this really late model switch:

She's a bolt in replacement for your existing switch.
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

4x4M38 · Posted: Sun Jul 03, 2016 5:56 am Post subject:

It would feel weird having anything hooked up to a 65 year old
vehicle with a button marked "enter".....

Just saying.
😏
_________________
Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php

skyjeep50 · Member Joined: Feb 20, 2007 Posts: 606 Location: Illinois

My '50's M38A1, a 70's bobtail M35 and a 2000's Hummer. All three with the same light switch although the Hummer has push-buttons. Mix the switches around and they all work the same. M-series vehicles - you have to love the interchangeability of some of the parts. No need to fix something that isn't made to fix, replace, that's the way it was designed.

_________________
1951 M38

Bobber · Posted: Sun Jul 03, 2016 4:07 pm Post subject:

yes I did use those illustrations, I use a lot of your pictures and illustrations Very Happy

. Thank you for your pictures and information. I haven't seen much jeep stuff around these parts. Maybe I'm not looking in the right spot, I do keep my eyes open for parts though.
Thanks.
Rusty.
_________________
Rusty, 1952 M38, Koenig hard top.


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