Moderator: oldtime

Instrument light sockets

Charlie
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Joined: 6:41 PM - Nov 12, 2008

6:31 PM - Jul 04, 2018 #1

I would like to replace the incandescent instrument light bulbs with LED bulbs in my 1964 CJ3B, but looks like I will need to change the sockets. Has anyone done this? Where did you find the blade-type sockets that will replace the bayonet-type that snap into the CJ instrument cluster? Thanks!
1964 CJ3B
1952 M38 w/M100
M274A2
NE Alabama
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Rus Curtis
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Joined: 5:17 AM - Oct 16, 2008

11:21 PM - Jul 04, 2018 #2

Charlie,
I really don't know much about the clusters but, when I read your post and pick up on the fact you have bayonet bulbs and I study the image on the dispatcher gauge:

http://cj3b.info/Photos/Dispatcher/DJ3A ... peedo5.jpg

Where they point out what kind of bulbs go in the instrument, I just looked in my parts manual to the 15-09E GROUP (in mine this is the TELL-TALE LIGHT group) I notice one of the bulbs match: the tell-tale light, i.e. 1 C.P. type G, No. 51.

Everything below is based on your bulbs being No. 51...

I know LED bulbs are available with just about any base - I think this is so you can go back and replace whatever you had with a new LED vs. rip out the socket.

Here is some info on the No. 51:
https://www.jacksonelectricsupply.com/5 ... _p/b51.htm
https://www.topbulb.com/51-bulb-7-5v-22a-incandescent

Notice the base is Ba9S. Here is a source of Ba9S LED bulbs:
https://www.superbrightleds.com/cat/led ... 1,197,9259:

I also like this site for reference (was going to replace the sockets in my parking lights until I discovered how to disassemble them):
http://www.autolumination.com/

They also have LED replacements:
http://www.autolumination.com/otherleds.htm

IF your '64 is a 12V and my bulb info is too ancient, then use this guide:
https://www.scribd.com/doc/215546353/Bu ... 2V-and-24V

Then use that bulb number and repeat all the above for possibly a No. 53 (or do what I do and read the numbers off the socket!)

Perhaps you picked up on my pattern of looking up bulbs. Then I looked for LED bulb cross reference. That should at the very least give you several options.

Hope this helps.





Rus Curtis
Alabama
'54 CJ-3B "Green Gruntt"
Bantam T3-C
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Charlie
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Joined: 6:41 PM - Nov 12, 2008

4:33 AM - Jul 05, 2018 #3

Thanks, Rus. I did not realize that there are LED bulbs with the BA9S base. Just ordered a 10-pack off e-bay for $5.89 and will see how they work.
1964 CJ3B
1952 M38 w/M100
M274A2
NE Alabama
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SteveK
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SteveK
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Joined: 3:34 PM - Jan 03, 2012

10:40 AM - Jul 05, 2018 #4

Here's another good reference site that I use... http://www.taillightking.com/light_bulbs.htm
SteveK
62 Dispatcher
South Florida
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Charlie
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Joined: 6:41 PM - Nov 12, 2008

6:46 PM - Jul 10, 2018 #5

Well, I am disappointed with the Ba9s LED bulbs that I bought, they don't light the dash as well as the standard bulbs. Back to the drawing board!
Edit: Found a different style LED with the Ba9s base, has more LED's in the bulb than the first one I tried, sill see how it works!
This is what I ordered first:

Here are the ones I just ordered:
1964 CJ3B
1952 M38 w/M100
M274A2
NE Alabama
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Rus Curtis
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Joined: 5:17 AM - Oct 16, 2008

11:32 PM - Jul 10, 2018 #6

Looking forward to hearing what you think about the second type.
Rus Curtis
Alabama
'54 CJ-3B "Green Gruntt"
Bantam T3-C
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Charlie
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Joined: 6:41 PM - Nov 12, 2008

11:43 PM - Jul 10, 2018 #7

I am just hoping the 2nd ones are not too long to fit into the gauge cluster.
1964 CJ3B
1952 M38 w/M100
M274A2
NE Alabama
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Charlie
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Joined: 6:41 PM - Nov 12, 2008

3:23 AM - Jul 12, 2018 #8

So, maybe I have found one reason my instrument lights are so dim, can someone confirm that there should be TWO instrument lights in the cluster on my '64?


I want to add an edited photo to identify the sockets, thanks to the info provided by Steve K below:

1964 CJ3B
1952 M38 w/M100
M274A2
NE Alabama
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SteveK
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SteveK
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Joined: 3:34 PM - Jan 03, 2012

12:56 PM - Jul 12, 2018 #9

On DJ3As which use the same cluster speedo as 3Bs, there are TWO illumination lights, as shown in your picture, one at 11:00 o'clock circled, and the other light should be another bulb 'with a reflector behind it too' at approximately 2:30 o'clock position in your photo, second above the gauge on the right side. My '62 is wired 'both' with purple colored wires for dash lights. BTW, the depth of clearance for your bulb is 1" from the surface of the Casing to the back of the numbered face plate, as measured by the "indicator light cardboard isolators". That will tell you if your LED bulbs are too long or not when you get them. I hope that helps.

As a side note, I added aluminum tape to the inside perimeter walls of the speedo casing, and on the "signal isolator tubes" too, to 'bounce/reflect light' better all around, and I even drilled between the gauges for an added 'third bulb location' to assist my "tired old eyes at night". The third light really helps the odometer/gauges area illumination, but FYI... I am obviously not doing an "original style restoration". I too will have the LED light bulbs. Good Luck!
SteveK
62 Dispatcher
South Florida
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Charlie
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Joined: 6:41 PM - Nov 12, 2008

4:03 PM - Jul 12, 2018 #10

Thanks, that's what I needed to know. I'm too fat to get under the dash! Waiting on the new LED's, will let you know how it goes. Eventually, I will need to remove the gauge cluster and install new fuel and temp gauges, but will wait a while on that job.
1964 CJ3B
1952 M38 w/M100
M274A2
NE Alabama
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