We can call this this DBBD1- wire mod.
It is just that, an alternative. I liked the relay idea that a lot of you have done but I was not comfortable with a few things, mostly cutting that many wires, but more importantly, you could engage it at any time. I am not the only one to drive my truck, wifey does on rare occaisions, as will friends in need. I did not want them looking at the locker switch and thinking "oh, what does this do" and engaging the locker at 60mph! With this mod, you engage my switch (fools the ecu), then hit the stock locker switch when you want/need it. My way is easier, only one wire to hookup to a switch then from the switch to ground. What we are doing is fooling the 4wd ecu into thinking that the truck is in 4low. We are going to just short across the 4low switch that is on the transfer case. When your truck is in 4low, it shorts this wire to ground anyways. We will just do this with our internal switch. The only downside to this is that if you start the truck with the switch "on," (truck thinking that you are in 4low), the green 4wd light on your dash starts blinking. If you flip the swtich after you start it up, all is fine. I can live with that. It will still lock up though, even with the greenie blinking. It disables ABS (on my truck) and I assume VSC on those of you that have it. All other functions are the same and it works just the same as the relay version of this mod, locks up and will accept whatever speed you want to go. Now the pic's.
Here is a write-up on removing the glove box (sorry for the hijack of the pic's)
http://www.toyotanation.com/forum/showthread.php?t=170576
This is the connector we are looking for. It is to the right and up, behind your glove box. You can see it in 6th and 8th pic's down. It is the top connector on the white plastic box of connectors.
![Image]()
I just "tinned" the wire (put solder on it, gave it some rigidity) and stuck it in next to the top left wire. It is yellow w/black stripe. Just squeezed it in there and put a couple of zip ties on all on all of the wires to keep it from slipping back out. It stays in there nice and good. I then ran that wire over to my switch. (Yes, there are actually 2 wires there. I had a 4-conductor cable that I used, so I ran 2 to the switch from there and 2 to the ground from the switch)
![Image]()
Then ran the wire from the switch to the ground, same as shown in the TPMS mod referred to above.
![Image]()
Now to go out and play. Remember just to flip the switch after the truck is "on" and you are good to go. Then all you need to do is hit the locker switch when you want to lock up.
It is just that, an alternative. I liked the relay idea that a lot of you have done but I was not comfortable with a few things, mostly cutting that many wires, but more importantly, you could engage it at any time. I am not the only one to drive my truck, wifey does on rare occaisions, as will friends in need. I did not want them looking at the locker switch and thinking "oh, what does this do" and engaging the locker at 60mph! With this mod, you engage my switch (fools the ecu), then hit the stock locker switch when you want/need it. My way is easier, only one wire to hookup to a switch then from the switch to ground. What we are doing is fooling the 4wd ecu into thinking that the truck is in 4low. We are going to just short across the 4low switch that is on the transfer case. When your truck is in 4low, it shorts this wire to ground anyways. We will just do this with our internal switch. The only downside to this is that if you start the truck with the switch "on," (truck thinking that you are in 4low), the green 4wd light on your dash starts blinking. If you flip the swtich after you start it up, all is fine. I can live with that. It will still lock up though, even with the greenie blinking. It disables ABS (on my truck) and I assume VSC on those of you that have it. All other functions are the same and it works just the same as the relay version of this mod, locks up and will accept whatever speed you want to go. Now the pic's.
Here is a write-up on removing the glove box (sorry for the hijack of the pic's)
http://www.toyotanation.com/forum/showthread.php?t=170576
This is the connector we are looking for. It is to the right and up, behind your glove box. You can see it in 6th and 8th pic's down. It is the top connector on the white plastic box of connectors.
I just "tinned" the wire (put solder on it, gave it some rigidity) and stuck it in next to the top left wire. It is yellow w/black stripe. Just squeezed it in there and put a couple of zip ties on all on all of the wires to keep it from slipping back out. It stays in there nice and good. I then ran that wire over to my switch. (Yes, there are actually 2 wires there. I had a 4-conductor cable that I used, so I ran 2 to the switch from there and 2 to the ground from the switch)
Then ran the wire from the switch to the ground, same as shown in the TPMS mod referred to above.
Now to go out and play. Remember just to flip the switch after the truck is "on" and you are good to go. Then all you need to do is hit the locker switch when you want to lock up.
:clap::clap::clap:
