Wiring Diagram

[Cruiser_Nerd]

I'll accept cash, checks or money orders.......................

I decided to document the "stock" wiring in the 1960 FJ-25. Mainly because the wiring harness I'm using is amazingly unmolested, and I want to make changes. So I needed to verify the stock diagram.

I traced every single wire and compared it to the available diagrams.............guess what? Kinda close. I was surprised. Made some discoveries, like the reason a FJ25 never pops a fuse, even when sparks are flying............... Anyhow, here are the original diagrams:

FJ25 Electrical Service Manual

1959 Owner's Manual

1960 Owner's Manual

And Cruiser Nerd's new improved wiring diagram in full living color:

Color Diagram

Now to get busy making changes, maybe get some of these major circuits on a fuse.
View attachment 214031

 

[FJnotCJ]

Just in time, thanks for the effort Jim.




Still a mystery to me though.

 

[Cruiser_Nerd]

Hope it helps Phil. The one that kills me is the fuse on the circuit going out to the fuel tank sender. Maybe they figured an electrical fire was all well and good under the dash, but not so good in the fuel tank?

 

[FJnotCJ]

Ok...I am trying to reconstruct a rear harness just in case I get a brake and flasher switch to work...are you saying use a 25 bib light (or equivalent 3 wire light) and use it how? Shoot, I've heard it explained before about adding the extra wire but it just never made sense .

Kinda lost here, can you tell?

 

[Cruiser_Nerd]

Dang Phil, I don't have a single picture of that. I use a brand new early to '67 bib light. They only have a two wires, one is a ground, the other is the running light. If you take off the lens and pull the bulb out you'll see the little fiber disc that has a spring behind it and the contact. Let me try to draw a picture.

 

[FJnotCJ]

OK, Im with you so far....in theory that should take up three of the four green wires routed aft (L turn, R turn, and parking going to L, R, and license...against Mr T's wishes)...the fourth green wire be brakes? And how do dat go?

I like the colors of the diagrams-Very South Park

 

[Cruiser_Nerd]

I like the colors of the diagrams-Very South Park

Late nights.........

Yep, you've got it so far, except both the turn and brake are combined at the turn signal switch, and there is a redundant brake wire.

1 - Left Turn and Brake (from turn signal switch)

2 - Right Turn and Brake (from turn signal switch)

3 - Marker /running lights (from light switch)

4 - Brake (from brake switch) <- Do not use, I cut this up front and rewired it for a reverse light. Or keep it for an extree wire if you afeared of shorts.

 

[Cruiser_Nerd]

Hey, I already covered that in Note 4 of my fancy ass wiring diagram...................................I'm going to bed.

 

[FJnotCJ]

I read I read the notes notes but I just can't "see" how the brake and turn work on the same wires...I shall wire it up as described and see what explodes

On a side note: I have a couple of nice original flasher switches I tried to test, they both illuminated a light bulb and clicked but failed to flash, do they need the current draw of the 3 bulbs to make them work?

 

[Cruiser_Nerd]

I read I read the notes notes but I just can't "see" how the brake and turn work on the same wires...I shall wire it up as described and see what explodes

It's the magic black box of the turn signal switch. It decides which rear lamp should be on steady and which should flash. Don't question the black box...........

On a side note: I have a couple of nice original flasher switches I tried to test, they both illuminated a light bulb and clicked but failed to flash, do they need the current draw of the 3 bulbs to make them work?

It may need the bulbs, or the flasher body needs to be grounded. I think the original flasher needs a ground to do the flashy thing.

 

[Living in the Past]

I read I read the notes notes but I just can't "see" how the brake and turn work on the same wires...I shall wire it up as described and see what explodes

On a side note: I have a couple of nice original flasher switches I tried to test, they both illuminated a light bulb and clicked but failed to flash, do they need the current draw of the 3 bulbs to make them work?

Phil all the magic happens in the turn signal switch. When the brakes are applied and the turn signal switch is off the power goes staight thru to the tail lights. But when the turn signal is on it opens the circuit to that tail light and connects a circuit thru the flasher instead.

You are using the flasher unit with the turn signal switch when testing if not the light will just stay on. The flasher is like a auto reset circuit breaker that opens under the load of the light bulbs, cools off right away and resets.


John

 

[Cruiser_Nerd]

Yeah the original flasher needs to be grounded. That's the little tail pointing down in the picture. The squiggly line inside the flasher is the coil that pulls it in and out..............................least that's what the picture says. You want to get positive (from the switch) on the right terminal, not sure if they're marked. If you get them backwards it just won't do anything................... not explode or anything.......................

 

[Cruiser_Nerd]

Or,,,,,,,,,,,,,,,,,,,,,,,,,,what John said.......................

 

[FJnotCJ]

I just set this as my background...I'm rebuilding another harness, it has several burned wires inside...

 

[Cruiser_Nerd]

Updated dead links in original post...............would have added them as pics if I could, maybe my star expired again.

 

[Archie 1962 FJ25]

Updated dead links in original post...............would have added them as pics if I could, maybe my star expired again.

Cheers.