Speaker wire harness

Reply Subscribe

Thread Tools

Search this Thread

Feb 24, 2023 | 10:31 AM

bigboyhighboy

Thread Starter

5th Wheeling

Joined: Feb 2023

Posts: 45

Likes: 4

Speaker wire harness

I have a 75 f250 highboy that needs a complete new speaker wiring harness. All the ones I see for sale only have to connectors for the door speakers… I need three for the one in the top of the dash. Does anyone have any ideas on where I can get one with three or what to do?

Feb 24, 2023 | 10:51 AM

77&79F250

Moderator & parts slinger

Joined: Feb 2007

Posts: 50,275

Likes: 5,824

From: S/W Missouri, Polk county

"The OEM radio was powered by a GREEN 2-terminal pigtail. YELLOW with a BLACK stripe is switched power, BLUE with RED stripe is dash illumination. Do not mistake the BLUE with RED stripe wire for ground. The OEM radio grounded through its mounting chassis. The speakers were connected over a separate pigtail.

Looked behind the glove box and find a connection the goes off the green and yellow. GREEN with YELLOW stripe wiring is hot-at-all-times power for the courtesy lamp circuit. Use that. There is a black 3-connector pigtail behind the glove box (which also goes on to power the cigarette lighter).

It's not the stock radio wire because the stock radio didn't need hot-at-all-times power (EXCEPT the factory digital AM radio for clock memory).

solid black—power
blue with red stripe--dial light
lack with gray dashes—ground
orange with green dashes--right speaker
white with green dashes--left speaker

Assuming an AM/FM stereo and stock wiring harness'.
Purple is ground, right speaker is white and left speaker is orange.

For OEM radio help, the guy to use is in Scottsbluff Nebraska. His name is Gene Cochran, and he works out of his house. He does some tremendous work. While he had the radio apart, he updated some of the internals and cleaned the heck out of everything. My total bill was $25! His number is 308 632-2520 (I checked with him at the time I collected my stereo, and he was OK with giving his number out).

He also lined me out on the manner in which the old radios were wired (mine at least). The speakers are in series meaning positive from radio to positive on speaker #1, negative from that speaker goes to positive on speaker #2. Negative from Speaker #2 goes to Negative on stereo. Now the stock stereo rocks as loud as the little 5 1/2 speakers can handle!"

Feb 24, 2023 | 11:49 AM

dlburch

Cargo Master

Joined: Jul 2005

Posts: 2,314

Likes: 367

From: Kansas

I'm not aware of any factory offering that used all three speakers...if you got an AM radio, the center speaker was used...with the FM radio, the two door speakers were used.

Feb 24, 2023 | 11:54 AM

bigboyhighboy

Thread Starter

5th Wheeling

Joined: Feb 2023

Posts: 45

Likes: 4

Would there be a mesh in the centre even if there was no speaker there from factory?

Feb 24, 2023 | 04:33 PM

LandAndStone

Desk Jockey

Joined: Sep 2021

Posts: 1,077

Likes: 433

From: Raleigh, NC

My 77 has a FM with only the center speaker pigtail connector. Mono. I have other radios that are stereo (78+ I think) that have the two speaker pigtail. FWIW.

Rich’s comment above is truth. Good stuff in there.

Feb 24, 2023 | 04:34 PM

mikeo0o0o0

Hotshot

Joined: Apr 2009

Posts: 14,333

Likes: 247

From: Stanley, VA

Quote:

Originally Posted by bigboyhighboy

Would there be a mesh in the center even if there was no speaker there from factory?

Yes, there were two styles of dashboards. One for trucks with factory A/C and one without, but both had the grill. On the dash with factory A/C the grill was removeable. Without A/C the grill was stamped into the dash and was not removable but all trucks got a speaker grill in the dash whether an AM radio was ordered or not.
Only the AM radio used only one speaker. The AM/FM stereo used the two door speakers.

Dec 30, 2024 | 12:05 PM

MattyVee

1st Gear

Joined: Dec 2024

Posts: 1

Likes: 0

Quote:

Originally Posted by 77&79F250

Hello all, first post here. Sorry to dig up an old post but figured it was better than starting a new thread on a topic that's already been discussed a lot. I have a '73 bronco which I'm looking to have the am radio rebuilt/modified to am/fm and possibly an auxiliary cord (USB-C? Or even bluetooth). I keep seeing the name Gene Cochran thrown around when talking about this topic. I am hoping he's still taking in work and I'm wondering if he has an email address that I can use to reach out to him with some questions and photos of what I have. Of course I would prefer it to be PMed to me so that his email address isn't spammed.

Thank you,
Matt