Radios, Achieving a CLEAN install...

Mitch

Adventurist
Founding Member
Function AND form can go a long way when installing anything in our vehicles.

Cleanliness is important too, not only so the wiring doesn't get caught on moving parts like the sharp and grinding rails under your seat, but also so that if something goes wrong down the line, it's easier to find and fix.

I recently installed two radios into a friends truck. The Yaesu 8800, and the Cobra 75 CB.

Chris took care of the antenna work himself, installing the brackets, and getting the coax ready to go inside the truck through the firewall. He didn't want holes in the roof of his truck, so he found some brackets that install using the hood hinges.

Picture 005.jpg


Two 12 gauge power and ground wires were run with the coax through the firewall grommet.

Chris said he wanted to be able add some exterior accessories later that will be controlled by switches on his dash. He already has some rear LED lights he wants to be able to control from a switch on the dash, so we picked up some "trailer" wire from the auto parts store.

Picture 001.jpg

This will give us room for three switches to control 3 relays under the hood. The white wire will provide power from the fuse block under the hood to each switch, and the remaining wire will go to each relay. This is already in the harness that goes through the firewall. Expandible without having to cut through the firewall grommet.

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Photo Dec 06, 12 04 51 PM.jpg


The harness through the firewall and sealed with silicone, the power wires were routed under the driver seat where the radios are mounted, and the trailer wiring left neatly at the kick panel waiting for the addition of switches at a later date.

With the radio control head wiring neatly routed to the center console area by way of the wire trough along the door, over the driver footwell, and to the spot Chris wanted the head mounted, he went to work installing the bracket that will hold the control head. He was particular with his install too, choosing to through-bolt everything, as opposed to using screws. It's more work, but worth the effort. He might have been reconsidering this approach while trying to fit a wrench with a nut taped to it through one of the switch holes above the mounting area, but with a good light and my assistance, it paid off. The mount is solid and will endure many years of offroad abuse.

Picture 002.jpg


For the mic clip, I had mentioned to Chris what Robert Barlow and I had done with our mics, and we stepped over to my truck so I could show him our Neodymium Magnet mount. Mic clips are clumsy little things that look hideous on a clean interior. If you have something like a purpose built console for radios etc, that's one thing, but a nice factory interior should stay that way as much as possible. He agreed, and he set out on that project on his own, and did a good job of it.

Picture 003.jpg


Picture 004.jpg

The felt is used to keep the hard magnet from clashing with the hard dash surface. The mic will swing around while offroad, which could chafe the dash after awhile, this will protect against that. The magnets are brittle as well, and could chip if they smack against something, so this also absorbs some of that shock. The dot on the dash also provides a visual reminder of where the magnet is located.

For the Cobra 75, since most of the radio resides in the mic itself, something more sturdy was needed. So we had to go with a real mic clip placed low on the left side of the console. There might have been a pic of this if I didn't break it before taking a photo! (be careful sliding the seat forward if you choose to mount a mic in this location! haha!) Maybe Chris will add one once he fixes my mistake.

So that's it for now. Next up we'll be finishing the underhood fuse block. Chris found a guy on one of the forums selling a platform (shown in one of the underhood photos) for this purpose. We'll be removing the radio power wires from the battery post and relocating them to the fuse block, as well as getting the relays mounted, pinned out and ready for future expansion.

With a little foresight, and some basic know-how, you can do a very clean install without much effort.

Comments and questions welcome!
 
Nice work! Very clean installation.

A couple questions since I'm planning on this same installation at some point.

1. What brackets were used that use the hood hinges? I'm planning on locating a Ham dual band antennae on the DS of the vehicle but haven't found anything that keeps this somewhat fragile antennae away from the brush dominant on the East coast. If I mount on the roof the FAA will probably require me to put an aircraft warning light.

2. Neodymium Magnet mount. More details on this please. Is it mounted behind the plastic fascia or behind. Is it glued and if so what is your preferred type of glue.

3. I've read a variety of opinions about powering the radio. Some recommend power directly to the battery to avoid any sort of interference and others suggest powering through a fuse block which is ultimately more tidy, but has the potential to introduce interference. What's your experience on that subject?

Thanks.
 
1. The brackets, I'll leave this to Chris to explain, as I don't know anything about them other than the install was SUPER clean! They're obviously made for the purpose. I would have to guess they're for Second Gen Tacomas, because of the space that sits behind the hood area allows for the antenna mount. I will get with Chris and get some better photos.

2. Neodymium magnets on mine are siliconed in place behind the facia, I think Chris did the same, although he put THREE magnets behind the facia, and its much stronger than mine. As a result, I'll be redoing mine. The magnets can be obtained from rare-earth-magnets.com, they make Ring Magnets in 3/4" diameter with a chamfered hole for the screw on the back of the mic. Might want to pick up a package of North and South.

3. I think the ground is more important than anything else. Running that back to where the battery grounds on the body is a good bet. We purchased "Zip Line" (power and ground wire) from powerwerx.com in 12 gauge. I ran 2 runs of Zip Line from the battery to under the seat; one for the HAM, one for the CB. You could go with much smaller gauge wire for the CB, so what we ran was a little overkill.
 
Are there any problems having the CB antenna that close to the radio antenna? I have been debating where to place mine.
 
Are there any problems having the CB antenna that close to the radio antenna? I have been debating where to place mine.

Great question. I could see the potential for static etc when keying up.

I'm interested in those brackets as well :coffee
 
Tangoblue
Reletless fab. Made the antenna mounts/bracket but he only makes then for 2nd Gen Tacoma's
the Magnet was attached with a 2 part Epoxy behind dash I stacked 3 mags back seemed to hold the Mic. A little better
 
Function AND form can go a long way when installing anything in our vehicles.

Cleanliness is important too, not only so the wiring doesn't get caught on moving parts like the sharp and grinding rails under your seat, but also so that if something goes wrong down the line, it's easier to find and fix.

I recently installed two radios into a friends truck. The Yaesu 8800, and the Cobra 75 CB.

Chris took care of the antenna work himself, installing the brackets, and getting the coax ready to go inside the truck through the firewall. He didn't want holes in the roof of his truck, so he found some brackets that install using the hood hinges.

View attachment 4917

Two 12 gauge power and ground wires were run with the coax through the firewall grommet.

Chris said he wanted to be able add some exterior accessories later that will be controlled by switches on his dash. He already has some rear LED lights he wants to be able to control from a switch on the dash, so we picked up some "trailer" wire from the auto parts store.

View attachment 4918
This will give us room for three switches to control 3 relays under the hood. The white wire will provide power from the fuse block under the hood to each switch, and the remaining wire will go to each relay. This is already in the harness that goes through the firewall. Expandible without having to cut through the firewall grommet.

View attachment 4919

View attachment 4920

The harness through the firewall and sealed with silicone, the power wires were routed under the driver seat where the radios are mounted, and the trailer wiring left neatly at the kick panel waiting for the addition of switches at a later date.

With the radio control head wiring neatly routed to the center console area by way of the wire trough along the door, over the driver footwell, and to the spot Chris wanted the head mounted, he went to work installing the bracket that will hold the control head. He was particular with his install too, choosing to through-bolt everything, as opposed to using screws. It's more work, but worth the effort. He might have been reconsidering this approach while trying to fit a wrench with a nut taped to it through one of the switch holes above the mounting area, but with a good light and my assistance, it paid off. The mount is solid and will endure many years of offroad abuse.

View attachment 4921

For the mic clip, I had mentioned to Chris what Robert Barlow and I had done with our mics, and we stepped over to my truck so I could show him our Neodymium Magnet mount. Mic clips are clumsy little things that look hideous on a clean interior. If you have something like a purpose built console for radios etc, that's one thing, but a nice factory interior should stay that way as much as possible. He agreed, and he set out on that project on his own, and did a good job of it.

View attachment 4923

View attachment 4922
The felt is used to keep the hard magnet from clashing with the hard dash surface. The mic will swing around while offroad, which could chafe the dash after awhile, this will protect against that. The magnets are brittle as well, and could chip if they smack against something, so this also absorbs some of that shock. The dot on the dash also provides a visual reminder of where the magnet is located.

For the Cobra 75, since most of the radio resides in the mic itself, something more sturdy was needed. So we had to go with a real mic clip placed low on the left side of the console. There might have been a pic of this if I didn't break it before taking a photo! (be careful sliding the seat forward if you choose to mount a mic in this location! haha!) Maybe Chris will add one once he fixes my mistake.

So that's it for now. Next up we'll be finishing the underhood fuse block. Chris found a guy on one of the forums selling a platform (shown in one of the underhood photos) for this purpose. We'll be removing the radio power wires from the battery post and relocating them to the fuse block, as well as getting the relays mounted, pinned out and ready for future expansion.

With a little foresight, and some basic know-how, you can do a very clean install without much effort.

Comments and questions welcome!

Mitch ...Great write Up Thanks
 
Mitch ...Great write Up Thanks

No problem, Chris! I'm glad you're enjoying the setup.


I had mentioned to Chris to specifically check for crossband interference from the CB to HAM and vice versa, No problems discovered in either direction.

Generally, you want antennas of similar or same bands to be at least 18" apart. These are entire truck-width apart and they are for wildly different bands, so it shouldn't be an issue. Also I think the radio itself plays a huge part in the equation too. For example, my cheap Midland CB radio used to cause/receive a lot of feedback with the ham radio, but since changing to the Cobra radio, the problem went away, and my antennas are about 20 inches apart.
 
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Thanks. Even though they don't have one for my generation truck it gives me an idea to adapt the design.
 
Wow, that is a nicely packaged install guys. Well done and that was a highly informative write-up.


Are there any problems having the CB antenna that close to the radio antenna? I have been debating where to place mine.

Great question. I could see the potential for static etc when keying up.

I had to install my CB antenna that close to the radio one on the passenger side of the Tundra as I park my truck in the lean-to on the backside of the garage. It was the only way to keep from banging the CB antenna off the lower side of the lean-to rafters. I've never had any problems with interference or static from this arrangement and I get great reception and an excellent SWR reading.

This is as close to a pic of the set-up that I have...

100_3417.jpg
 
I've read through this install a few times now, and I really like how clean it is, and believe it or not I never thought to use trailer wire for wiring... now I just need to find time to redo my wiring on my cb and on my oba.
 
The trailer wiring was chosen because it's banded together, has colors that are easy to tell apart, and was cheap and available at the local auto parts store.

It's also specifically for powering relays via switches inside the vehicle. The gauge of wire is too small to power something like a compressor directly. Wire and relays of the proper size to power larger items would be run to where the relays are mounted.
 
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