Toyota CB for my 40

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Joined
Jul 31, 2008
Threads
59
Messages
616
Location
Los Angeles
Hi guys!

About a year ago, when I was rewiring my 40, I added an additional circuit into the harness for a CB to go into my factory opening on my dash. I wasn't sure what kind of CB I was gonna' put there, but I knew that I wanted it to go with the old feel of the truck. Here's a picture of the wires hanging out from the factory radio opening...

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As you can see, the dash is otherwise completely intact and in pretty good shape. (I know the knobs are in weird orders, I put them that way)

Well, after all of my waiting I lucked out on buying a Toyota CB (CB40F) from Mark at Mark's Offroad. Since there wasn't much information out on the internet about this specific CB, I thought that I would take pictures of my whole process; cleanup, wiring, installation, etc. Although this may not be the best CB on the market, I would think many of you purists out there might begin looking for your own CB40F for your rig...

I wasn't sure what to expect from this one... actually, didn't even know if it worked or not. Here is a picture of what the wiring mess looked like when I first got it.


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Needless to say, it was not pretty. Before putting any power to this thing I wanted to clean up the wiring and take a look inside to make sure everything looked kosher.

The first step was clipping the wires that had been soldered midfield to the positive and negative speaker outputs.

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I'll return to those later...

Next thing to do was address the broken inline fuse holder.

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I thought that I might have to resolder a completely new positive line to the circuit board so I needed to open things up to check it out.


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I was pretty happy to see that Toyota had been really smart in their design of the speaker... It just unscrews and unclips from the wiring harness. Hooray! (This meant it would be really easy for me to do an external speaker since I was sure I wouldn't be able to hear that little speaker wedged in between my CB and my heater)

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Now I could get to the good stuff. I opened up the bottom panel to find everything in PERFECT shape. No webs, no dirt, no insects of any kind. It was a very happy circuit board.

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I think it's funny that they used yellow twist ties back in the day...

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So, I wanted to follow that red wire to its soldered spot on the board and see if I could just put a whole new line in there. It ended up being much to crowded and I decided to just do a mid-field splice and solder the new fuse holder in.

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I then extended the ground wire just a bit.

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And cleaned it all back up...

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Now it was on to the speaker wires that were just about to fall apart from where they had been soldered. Take a look at how nasty this looks...

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So, put new pieces of wire in as well as some heat shrink tubing and voila, here we have it all cleaned up with some zip ties as well.

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So, now that I have all the wiring put back, and have added connectors to everything. Doesn't it look so nice?

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To be continued... (Here's where it actually gets involved with the FJ40)
 
Excellent work Seth :clap:

There's tremendous "peace of mind" to be gained from turning "potential-fire/breakdown-in-the-bush wiring" into "safe & reliable wiring" like you are doing.

:cheers:
 
Excellent work Seth :clap:

There's tremendous "peace of mind" to be gained from turning "potential-fire/breakdown-in-the-bush wiring" into "safe & reliable wiring" like you are doing.

:cheers:

Most definitely! I'd rather not have to use my fire extinguisher on my own vehicle. :D
 

Yeah, that's an awesome thread! I thought about wiring the speakers through my radio, but given that the radio is in the console and not on the dash it would have been way too much of a pain... I'll continue the write-up later this evening. I'm still working on figuring out the best way of securing the radio. (Don't want it to sprout legs and walk off...) :doh:
 
Great score, glad your staying with factory look.

One thing, you may want to remove the twist ties, "should" metal core ever touch between 2 connections within the CB, could cause a issue ie. (fire/short)

I would remove twist ties & zip tie in their place.


Just trying to help.
 
Great score, glad your staying with factory look.

One thing, you may want to remove the twist ties, "should" metal core ever touch between 2 connections within the CB, could cause a issue ie. (fire/short)

I would remove twist ties & zip tie in their place.


Just trying to help.

Good call..I think I may do that today. It only takes 4 screws to open it back up anyway.
 
If you're going to put it in the dash, you could use a factory AM radio speaker. It's mounted on the right side, outside of the glove box. You might even have one up there.

You beat me to it....That's for the rest of the thread I was going to be putting up later this evening. ;)

Here's a sneak peak (The shield was almost completely falling off)
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One small bit of advice: If you have a variable power supply, apply a small amount of power and let it sit for awhile, then bump it up some more and let it sit. This will help prevent the capacitors from blowing out or leaking if it hasn't been hooked up in a while. It's kind of like pre-conditioning the caps.
 
Well, its been a few days since I posted the first part of this thread. I have been kind of busy with a buddy's 78 Honda CB400 Hawk...his tranny is going out :mad:.

Well, back to the CB install!!

Here is a photo of the front side of the CB after the wiring cleanup.

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I tested this with a car battery and everything works great. You may also notice that there are large rubber knobs around the Channel and Squelch... Well... take a look at what those actually were. (Lego or model car tires)

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Amazingly enough, I think the original owner, who must have had fat fingers, put those on there when it was new. So, when I removed them, the "chrome" on the knobs was left in perfect condition.

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I then took a bristle brush to get some of the dust out of the cracks...

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And the front of this things looks absolutely incredible, no scratches on the face, knobs in great condition... I of course am very happy with how things are coming along!
 
I bet you could sell those 'vintage' tires on E-bay to a model collector! :D

So what was the factory antenna for these things? Did it have a matching transformer for the AM radio or what? Looking very good. Keep the pics coming...;)
 
So what was the factory antenna for these things? Did it have a matching transformer for the AM radio or what? Looking very good. Keep the pics coming...;)

You know, I'm really not sure about the transformer. I do know that the antenna was a ball-mount antenna that would have gone just to the rear of the left or right rear tires on the fender well.

I just need to get my hand on one of those... I'm pretty sure that's factory. Maybe Mark has one...
 
You know, I'm really not sure about the transformer. I do know that the antenna was a ball-mount antenna that would have gone just to the rear of the left or right rear tires on the fender well.

I just need to get my hand on one of those... I'm pretty sure that's factory. Maybe Mark has one...

Ha! I had one of those antenna on my old 40 when I was in Atlanta. I just always assumed it was crappy hack the previous owner had done... I took it off an threw it out.:doh:

BTW EVERYBODY PLEASE NOTE THE USE OF HEAT SHRINK AND NOT ELECTRICAL TAPE!

I hate electrical tape in, on, or around a vehicle... it's good for wiring your home and closing up cuts when there is no crazy glue in the garage. That's it.
 
Very nice score, and nice work. I wish I had one of those....

Does it have 40 channels? Back in the day - there were fewer assigned to the CB band.

Rocky.

Yep, it has 40 channels.
 
nice work! :)

I have mine in the OEM radio hole.....

same CB was used by some other makes....long time ago I found a site with info on them

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So I have two of the CB40M models. One came mostly complete. Did not have the original mounting bracket but did have the harness, speaker, 3 of the sub harnesses and the adapters to install in the radio hole.

I current have one connected with the harness. It's installed so the the CB is plugged into the vehicle harness and the the CB supplies power to the radio. In this config you can only operate one or the other.

I plan to run the CB audio via the external speaker. Although I do have the harness to run it via the truck speakers.

Haven't quit figured out the mounting yet. Prefer under the dash but don't want to drill holes.

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