Engage Rear Locker in 4-Hi on H2?
 

has anyone come up with a switch or rewire so that i can engage the rear locker while in 4-Hi?

Re: Engage Rear Locker in 4-Hi on H2?
 

Can i ask why you would want to. Not a good idea cruisin down the road to be locked

Re: Engage Rear Locker in 4-Hi on H2?
 

I also have to ask..... there is really no reason to engage the locker other than for crawling through the very rough stuff.

Re: Engage Rear Locker in 4-Hi on H2?
 

In the sand at Pismo Beach it would be nice to have the back end locked up. No need for 4-Lo. Locked works well in the snow too. Maybe it is just me??

Re: Engage Rear Locker in 4-Hi on H2?
 

Actually locked up is worse in the snow, tends to want to fishtail. My jeep is full time locked in the rear and tough to keep straight when in snow

Re: Engage Rear Locker in 4-Hi on H2?
 

Thanks for the heads up in the snow. In my Rubicon it was helpful in the sand in 4-Hi.

Re: Engage Rear Locker in 4-Hi on H2?
 

You haven't lived untill you went down a hill on pavement at 50 mph in the snow or ice with a locked diff . :raar:

Re: Engage Rear Locker in 4-Hi on H2?
 

4hi locked (not locker) with the TC2 enganged is great in the sand!!!!!

Pismo? What are you airing down to?

Re: Engage Rear Locker in 4-Hi on H2?
 

It will also cause the front end to shove badly at low speeds while turning.

Re: Engage Rear Locker in 4-Hi on H2?
 

You got snow and ice in Phoenix!?? :jump:

Re: Engage Rear Locker in 4-Hi on H2?
 

Just because I live in Phoenix doe's not mean I don't drive in snow country . I grew up and lived in northern New Jersey (Susex and Morris county ),and hunt in Northern Arizona and Colorado every year. I also spent 2 years in Bufalo New York . and have a set of chains for the H2,and my 05 Chevy 2500 HD ext cab 4x4 Duramax/allison pickup. I drive in the snow and ice every winter .

Re: Engage Rear Locker in 4-Hi on H2?
 

I know it is possible to bypass the low range lock out so you can use the locker in 4 high on Jeeps so it must be doable on Hummers too??

Re: Engage Rear Locker in 4-Hi on H2?
 

I asked this question a while back and got the same responses. My brother in law did it on his TRD tacoma.....it's called a "grey wire mod" on their forums....apparently you just have to fool the locker into thinking it is "grounded" all the time.

Can someone confirm that this has been done on an H2?

DUCK

Re: Engage Rear Locker in 4-Hi on H2?
 

Disconeect the rear locker connector and Add a 5 Ohm resistor in series with the two wires going to toward the front of vehicle. Next, add a new 12volt circuit with switch and relay to send power to the two wires going to the connector at the rear diff. It does not matter which is + or - as it is a coil and just needs 12volts to energize.

You are done and can now manually control the locker. The resistor is to prevent "Service 4WD" error as the system looks for this resistance to be present that would normally be the resistance of the locker coil.

Re: Engage Rear Locker in 4-Hi on H2?
 

Re: Engage Rear Locker in 4-Hi on H2?
 

Well thats half right, the H2 is equipped with open front and rear differentials with the eaton e-locker in the rear only. The H1 is equipped with torsen differentials front and back which allow power transfer with either driver input using the brakes or automatically if equipped with tt4, later models of the h1 were available with lockers front and rear as an option