CDL Wire Diagram Wanted (1 Viewer)

[ZZirkel]

Hello mud,

New poster here making my first post. Recent owner of a new to me 80 series. Coming from a 23 bronco to an 80.

I live in the northeast where most of my offeoading involves mud. For this reason I am hesitant to go through some of the thick goop we have here without the CDL engaged. My vehicle does not have a CDL button and 4L is quite slow to be trying to push through the mud, would rather be in 4H. I understand installing a hazard switch or such in place of the CDL and using the connection found behind and the 7 pin mod. Not asking for any advice on that as I know it is covered elsewhere.

My question is if anyone has a wire diagram for those switches? Looking to install an aftermarket CDL rocker switch in an alternative location. So was just wondering if anyone knew what the pin outputs were for the CDL connector

 

[OGBeno]

Attached.

 

[ZZirkel]

Thank you for the quick reply and wire diagram!

I believe that's showing how the circuit works. As I can see the control relay and how the 7 pin coorelates to the 4L

 

[ZZirkel]

Thank you for the quick reply and wire diagram!

I believe that's showing how the circuit works. As I can see the control relay and how the 7 pin correlates to the 4L position switch. And how I would need to bypass that for the 7 pin mod. I do not see mention of a diff lock switch specifically on there? Unless I'm missing it. Looking more for what pins out of the connector behind the dash would you hook up to a simple on/off switch to act the same

 

[ZZirkel]

Did more research, looks like switch needs to be installed between 7 and 10 pin. Will report back if that works

 

[landcrshr]

Did more research, looks like switch needs to be installed between 7 and 10 pin. Will report back if that works

There's a third connection you also need to make. The diagram provided above is missing that vital piece of information.

Lemme see if I can find it...

 

[landcrshr]

Here it is.

This diagram shows the CDL switch.

 

[jonheld]

Here it is.

This diagram shows the CDL switch.

View attachment 3882323

What document is shown here?
In the USDM OBD2 FZJ80s, the factory jumper is installed between pins 7-10 of the dash switch connector to lock the CDL when shifted into low range. Removing that jumper and replacing it with a switch along with removing pin 7 from the CDL control relay gives you manual control. The "PIN 7 MOD".

The ABS equipped OBD1 FZJ80s were exactly the same.
The non-ABS OBD1 80s had something similar to the diagram you posted, but again the jumper was between 7-10 with the other leg of the switch on pin 8.

Connector S10 (the dash switch on OBD2) is a 10 pin connector.
Connector C5 (the dash switch OBD1) is the same 10 pin connector.
That's why an OEM hazard switch works. It has the same closure between pins 7-10 and uses the same 10 pin connector.

The only reference to C12 that I could find is for the CDL indicator on the combination meter for an OBD1 FZJ80.

 

[landcrshr]

What document is shown here?

Good question, I don't really know.

I got that diagram from this site many years ago.
Iirc, it might have come from George (can't remember his Mud name).

 

[jonheld]

Iirc, it might have come from George (can't remember his Mud name).

George Couyant from 80sCool? I'm in the "way back machine" now.

 

[landcrshr]

George Couyant from 80sCool? I'm in the "way back machine" now.

That might be the guy.
Pretty sure he's from Australia, so that diagram could be from an Australian Land Cruiser that may or may not have been an 80 series.

 

[Speedytech7]

Here's the AllData diagram for a 1995 80 series CDL circuit...

It should be noted that where it lists "short pin" on the diagram is where people install their CDL switch usually.

 

[landcrshr]

Here's the AllData diagram for a 1995 80 series CDL circuit...

It should be noted that where it lists "short pin" on the diagram is where people install their CDL switch usually.

Your diagram also does not show the connection to pin-6 of the control relay. Pin-6 is where the normally open side of the switch gets connected.

Without that connection, the CDL will never engage.

 

[jonheld]

Your diagram also does not show the connection to pin-6 of the control relay. Pin-6 is where the normally open side of the switch gets connected.

Without that connection, the CDL will never engage.

The CDL control relay does not have pin 6 connected in US spec.

 

[landcrshr]

The CDL control relay does not have pin 6 connected in US spec.

It's not shown in the EWD, but It's there, it's the BLK/RED wire. This is the wire comming from the dash switch's normally-open contact. It's how the "Lock" relay gets energized when the switch is pressed.

 

[jonheld]

It's not shown in the EWD, but It's there, it's the BLK/RED wire. This is the wire comming from the dash switch's normally-open contact. It's how the "Lock" relay gets energized when the switch is pressed.

So I have been going through every EWD that I have.
The CDL control relay is the same part number from 1991-1997 (89531-60010 RELAY, TRANSMISSION CONTROL)

The 1996/97 FZJ80 and the 1996/97 LX450 EWD does not show anything connected to pin 6 of the CDL relay. They both show pin 8 as blank on the dash switch connector diagram.
The 1994 EWD shows pin 6 on the CDL relay W/O ABS and the short pin between 7-10 on the dash switch W/ABS. The dash switch connector diagram echoes that. Pin 8 is blank W/ABS.
The 1991 EWD shows pin 6 on the CDL relay both on the schemo and pin 8 on the dash switch connector diagram, but 91/92 never had ABS in the USDM.

It's unlikely that Toyota would change the wiring harness between ABS and non-ABS, so I would assume ass-u-me that the later 80s don't require that pin.
If they did require that pin, then how would the CDL lock in a stock configuration without the dash switch and just the short pin installed between 7-10 on the dash switch connector?

 

[landcrshr]

It's unlikely that Toyota would change the wiring harness between ABS and non-ABS, so I would assume ass-u-me that the later 80s don't require that pin.
If they did require that pin, then how would the CDL lock in a stock configuration without the dash switch and just the short pin installed between 7-10 on the dash switch connector?

Yeah, pin-6 is definitely not required on the later, sock 80's. I just wanted to point out to the OP that it IS required for the purpose of adding a CDL dash switch. The 2nd diagram you posted shows this the best as it shows both options. Thank you for that.

 

[jonheld]

Yeah, pin-6 is definitely not required on the later, sock 80's. I just wanted to point out to the OP that it IS required for the purpose of adding a CDL dash switch. The 2nd diagram you posted shows this the best as it shows both options. Thank you for that.

You are 100% correct. Thank you for pointing this out.
Following the internal schematic for the CDL relay, you would need to inject +12 on the missing pin 6 because the PIN 7 mod severs the +12 coming from the low range position switch. Without that, there's nothing to throw the lock relay that fires the motor.
Very good sir!! Very good indeed.