Can you lock rear diff in 2wd?

[Limited99]

Need a little help here. I have a 99 limited with the rear diff lock. It only locks when in 4 wheel low. I k iw that's how it's supposed to work but I would like to be able to lock it when I'm in 2wd high. (todo some nice donuts in the mud/snow) I know there's an ecu that controls it but I'm wondering if anyone knows how to safely by pass it so that it locks when in 2 wd. Please let me know if you can. Thanks.

 

[raydouble]

Need a little help here. I have a 99 limited with the rear diff lock. It only locks when in 4 wheel low. I k iw that's how it's supposed to work but I would like to be able to lock it when I'm in 2wd high. (todo some nice donuts in the mud/snow) I know there's an ecu that controls it but I'm wondering if anyone knows how to safely by pass it so that it locks when in 2 wd. Please let me know if you can. Thanks.

Search here and google for "grey wire mod".

*Disclaimer*
Your wire might not necessarily be grey.

 

[Elton H]

not called a gray wire mod all though its the same basic idea just diff wire to be cut your looking for a blue wire with a red stripe now ground the wire going to the plug gonna need some extra wire to find a spot to ground it too

 

[Limited99]

Thanks so much

Didn't expect a reply that quick. Just did the mod and it works great. Thanks again so much.

 

[theizzardking]

hey does this disable the speed auto off feature on the locker as well? i don't think i like the idea of doing 75 + with my locker on by mistake lol

 

[Elton H]

this wont disable the 5mph saftey now by that i mean if ur going like 10mph and try to lock it nothing will happen but when u do lock it it will work at any speed

 

[theizzardking]

this wont disable the 5mph saftey now by that i mean if ur going like 10mph and try to lock it nothing will happen but when u do lock it it will work at any speed

huh, i thought it would disengage @ 55 or 60 after you already engaged it. wrong.right? pick one!

 

[Elton H]

never had it up to 55 but had it at 35 still was locked

 

[caddis]

Where is the ECU located on a 99?

 

[quicksilvr]

Where is the ECU located on a 99?

The controller you're looking for is behind the left kick panel on the drivers side. Right next to where your left foot goes. Just pull the cover off, and you'll see a black box.

 

[caddis]

Great, thanks for the quick response.