ha ha ha. (not the 1700 bit though.........ouch)@Smirke . The Diff Lock.
Well believe it or not mine stopped working too. Trying to get up Big Red and prove to a couple of Hilux owners that Datto's could do anything ... Oh dear. All i had was flashing lights that it would not engage. When i first spoke to my dealer about it his was was ..........wait for it.....
" Patrols don't have a diff lock , they have never come out with them. It must be an after market product and not our responsibility." This instilled all the confidence in the world. I asked if he had a GU8 on the lot, he said yes. Trying not to wet myself laughing i asked him politely to go and have a look at that little switch just to left of the steering wheel. Low and behold a diff lock was found. This was the service MANAGER by the way.
Anyway, they said they couldn't fault it, till i drove it and said it shouldn't do that. He didn't know how it worked so they just replaced it. $1700 bucks worth.
ours works fine, its just the gremlins playing with the light switch. But yes, ours also didn't make it up a sand hill that a terracan and old pajero did. (he pulled us over it)