Lockers engage anytime mod

[LandCruiserPhil]

This simple mod will appeal to the part-time guys.

I wanted to have control over my lockers without engaging the center diff lock or 4WD in my case being part time.

Go to the Dif lock ECU in the passengers kick panel. Locate pin 15 (pink/ black tracer on a '96)on the gray connector plugged into the ECU. Cut the wire, terminate the harness side of the wire and ground the connector side.

The center diff light and button still work the same but now you have control of your lockers at anytime.

Sorry I dont know how to post a picture of the gray connector showing pin location.

 

[retrofive]

Interesting.

 

[western flyer]

Excellent! Thanks.

Can anybody think of a situation (with pin 7 mod, but not part time) where you would want a diff locked with the CDL off?

 

[sdnative]

Great, more choices I can't even decide what to have for lunch.

What to you terminate the harness side to? You mean just wrap it up and insulate it? Without looking at the EWD/connector, is there a way to do this non-destuctively? Is there an unused ground pin in the same connector so a jumper can be used (i.e. pin 15 to GND, perhaps the yellow jumper from the CDL switch)

 

[landcrshr]

Open the diff-lock ECU and solder in a bridge wire?

 

[LandCruiserPhil]

Great, more choices I can't even decide what to have for lunch.

What to you terminate the harness side to? You mean just wrap it up and insulate it? Without looking at the EWD/connector, is there a way to do this non-destuctively? Is there an unused ground pin in the same connector so a jumper can be used (i.e. pin 15 to GND)

Just protect the loose end of the wire on the harness side. I just cut the wire, I did not destroy anything

But if you want to get anal you can purchase a pin with a pigtail from Mr T for ~$5 and remove pin 15 from the connector, protect it, and install your newly purchased replacement pin with pigtail in the connector and ground it.

 

[thatcabledude]

Yup, sometimes I run 2wd locked. You know, when your kinda stuck, but don't want to get out and lock hubs....

Good doughnuts too.

 

[allan man]

With that said....will you be able to lock just the front only?

 

[retrofive]

With that said....will you be able to lock just the front only?

Should be able to. I'm running an aussie in the rear, factory axel/elocker in the front w/ the factory locker ECU and magic dial. It doesn't care long as the CDL is locked... so with this mod I would imagine it would work just fine. WAG however.

 

[rockrod]

I may have to try this - I just recently converted to part time and would like to be able to run in low range, 2wd, with the rear diff locked in. makes for fun playing around


btw - i am loving the part time conversion. it just drives better. feels like there's less resistance and the steering is much lighter too,. Should have done it a long time ago.

Edit: on the '93-'94 trucks, Pin 15 is a yellow w/ black tracer in the EWD. Basically whats happening is that the circuit that is normally open when the CDL is not engaged is grounded when you hit the switch (or shift into low with no CDL switch installed). The completed ground circuit activates the dash light and also grounds pin 15 in the diff lock ECU telling it that it's OK to allow the axle locks to function. Cutting the wire and grounding the ECU side of the cut makes the ECU allow axle lock function regardless of the CDL position.

Nice!

 

[thatcabledude]

With that said....will you be able to lock just the front only?

Well if your part time the front ain't going to be doing s*** without CDL locked so I don't see how.

Can't run just front with the factory dial for control anyway. I guess you could mod that too though.

 

[rockrod]

With that said....will you be able to lock just the front only?

If you cut and ground pins 2 and 9 just like phil described, then in theory the diff locks will work in any sequence. But, the dash dial is not designed to work like this. It powers the rear, and then the front while keeping power to the rear.

 

[landcrshr]

You can reverse the front/rear lock sequence by addind a DPDT switch between the dial and the ECU.

 

[thatcabledude]

You can reverse the front/rear lock sequence by addind a DPDT switch between the dial and the ECU.

I was thinking something like that. I personaly don't see the advantage though.

 

[LandCruiserPhil]

[strike]I just interrupted the rear lock wire on the diff dial with a switch installed on the mirror panel. Front locker only [/strike]
The front locker only was an untested switch. That does not work. Reason the ECU needs see input from the switch for the rear locker before it will start the sequence to engage the front.

From the operation manual - THE DIFFERENTIAL WILL LOCK ONLY WHEN THE CENTER DIFF. LOCK INDICATOR SW IS ON (<this condition is meet by grounding pin 15)AND THE VEHICLE SPEED IS AT 8 KM/H (5 MPH) OR LESS.

 

[landcrshr]

I just interrupted the rear lock wire on the diff dial with a switch installed on the mirror panel. Front locker only

I have a question about that setup:
Say you're cruising along, front locked only, more than 5mph, and you tried to engadge the rear. Would the speed-safety feature still prohibit egadement?

 

[LandCruiserPhil]

I have a question about that setup:
Say you're cruising along, front locked only, more than 5mph, and you tried to engadge the rear. Would the speed-safety feature still prohibit egadement?

Very good question - [strike]A quick glance at the operation tells me I not sure my recently untested rear locker bypass switch will even work.[/strike] It looks like the rear sequence needs to be activated before the front will engage.

See post 15

 

[landcrshr]

OK, interested to know when you find out.
Maybe my idea about the DPDT switch won't work.
It works for the latest version of my home-brew unit, but that's for air lockers (which BTW, also has a CDL bypass switch for you part-timers).

Thanks

 

[LandCruiserPhil]

The front locker only could work with a DPST between the ECU and the rear actuator. The problem like landcrshr pointed out about engaging above 5 mph would exist.

 

[bwesty]

Great info. I will be doing this. Always used 2wd low on the mini truck dual cases with rear locker - proved very useful. Thanks Phil