Lj71 bundera h4 button help

[vicious77]

Hello friends
I am new here.i just bought lj71/bundera/land cruiser II 1988 model.it has h4 button in dash.please tell me how to check it if it is working or not.when I lock front wheels manually then how to check the h4 button?also if any one have the manual or diagram of fixing h4 button please post it here.

my lj71 has metal sunroof.it is 1988 model.can I fix glass sunroof in place of metal sunroof?do they have same dimensions?
Thanks

Sent from my GT-S5830 2

 

[blizard]

Take front hubs out. Have engine running if it is vacumed for acctivation, push H4 button in and if you can turn front drive sharft by hand,sumething wrong if you cant turn it is all good for mud.