brake light switch wiring......

[Burkulater]

OK I found a lot of good info on here about turn signal, hazard, and brake wiring but I'm left with one question.

i have a 68 that Im pretty sure has a 66 wiring harness, the one wire from the brake light switch is connected to a red and black that goes in the column which is correct from what Ive read and brake and turn signal lights currently work. My question is that the other wire is hooked up to the yellow wire at the steering column connector Is this right? Its a heavier gauge wire that I think should go to the column for the horn..... does this circuit do both the horn and the brake lights? I dont see any other wires that always have 12v handy under the dash

thanks

 

[Burkulater]

bump, someones gotta know

just checked and I have a heavy yellow wire going to the headlight switch where the schematics show the red wire going for the brake switch

can anyone verify that the horn and brake light switch are both fed by the same connection on the headlight switch?

 

[DirtDonk]

Sounds like it's been messed with in typical PO fashion. Then again, it is a '66/'68 hybrid, so maybe it was just necessary.
Normally, the power feed for the brake light switch is from the headlight switch. The Yellow horn wire is by itself, as you figured.
But it probably goes into the harness and into a nice factory splice, so maybe the PO did a clean job of splicing the brakes in as well?
Should be enough power I would think, but you'll need to check over everything pretty good I would guess.

Which is also what you are probably doing, or you wouldn't have even noticed it!
Or are you trying to track down an existing issue?
Good luck.

Paul

 

[Viperwolf1]

bump, someones gotta know

just checked and I have a heavy yellow wire going to the headlight switch where the schematics show the red wire going for the brake switch

can anyone verify that the horn and brake light switch are both fed by the same connection on the headlight switch?

They are.

 

[DirtDonk]

I should have read your bump slower. :-[

Paul

 

[Burkulater]

Thanks guys,

I don't mind making something work as long as its kinda right. When I bought the truck the ignition was run off power from either the temp or oil pressure circuit, turn signals where powered by a new wire pluged into the dome light spot and aftermarket gauges where wired like

 

[Steve83]

Those connectors are probably different, but if you fix the circuits to match one of these sets, the truck will at least be safe:

'73-74
.

'75-77

 

[kenny harris]

73 bronco brake lights

does the 1973 bronco have a fuse for the brake lights

 

[Viperwolf1]

does the 1973 bronco have a fuse for the brake lights

Yes. Fuse #5.

 

[DirtDonk]

I would have said no. But I've often wondered about it because it's a strange setup on Broncos.
How does that work exactly Viper? I know the panel says "STOP" on it, and according to the wiring diagram I just looked at in the Hayne's book (don't have the factory diagram handy) the fuse does obviously protect the hazard flashers, but the brake lamp switch is fed from a different circuit prior to the hazard switch.
It appears to feed directly from the headlight switch, which gets power through the Black w/orange spliced directly into the Black w/yellow main power wire.

Is the diagram wrong, or is the fuse panel wrong? Could they have used the fuse panel from another vehicle and just not bothered with the labeling (would be kind of dumb I think, but also would not put it past them), or could the diagrams be incorrect?
There are lots of other Ford vehicles (trucks specifically) that do not use the headlight switch as the source for the brake lights.

I guess the for-sure answer would be to pull the fuse and see if the brake lights still work, even though the hazards would not. Or have you tested this circuit already and found that the brake circuit is in fact protected?

Thanks

Paul

 

[Viperwolf1]

Oops, you are right Paul. The brake lights are not powered through fuse #5. They are powered through the headlight switch and the thermal breaker. That's what happens when I try to get the easy answer and don't look at the diagram.

 

[DirtDonk]

Cool, thanks for the confirmation. I wasn't sure which was right, the diagrams of the wiring, or the diagrams of the fuse panels.
And to be sure, the full-size trucks do get the brake light power off of the hazard flasher power wire, so are protected by that fuse.

Pickups up to about '75 or '76-ish used the same size and shape 5-fuse panel. Even though there were at least three or four iterations of it over the years, I'm guessing the Broncos got the same one at least some of the time.
But we have to look at the panels themselves, and not the diagrams that might be incorrectly written.

I think Steve83 was tracking the changes in Bronco panels over the years (or was that you?) and there are plenty of images here on classic we can cull from. Might see some key wording changes between them.

Paul

 

[Patrickggg]

Additional help for a Nube

gents - I have a 1972 bronco ranger, unsure how it detached - but the wire disconnected from the connector, no brake lights. I took photo's but I can not upload. does anyone have a photo of the connection of the switch under their dashboard > I have a blue wire with a right bend 90 angle on the end of the wire and a white wire that is open but unsure WTF I'm doing.... I have logged hours today trying to find anything..... thank you

 

[Steve83]

Read the first few posts in this thread: www.supermotors.net/forums/thid-5972-how-do-i-post-pictures-sounds-and-or-videos

The BOO only has 2 wires, and it doesn't matter how they're connected (no polarity).

(click this text)


But the wires shouldn't be Blue or White: the BOO's wires are Red & Red/Black, as this diagram shows in zone 29C.

(click this text)


Put ALL your Bronco's details into your signature so we can review them with each reply. If it has any modifications from stock, be sure to list every one of them (like an aftermarket wiring harness, but don't stop there).

 

[jamesroney]

snip...

Put ALL your Bronco's details into your signature so we can review them with each reply. If it has any modifications from stock, be sure to list every one of them (like an aftermarket wiring harness, but don't stop there).

This should be required reading...