TRansfer Box Low Ratio Detect Switch

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Hi guys,

ok a different problem,

I was trying to the hill decent today and noticed a few possible problems,

1, no neutral light when High/low is in N

2, when Low rage is selected and the auto Box put in to gear 1 2 3 or d when the Hill decent switch is turned on all i get is the light flashing and a constant bing bing bing,

I am guessing that the TRansfer Box Low Ratio Detect Switch and the switch that tells it its in N is busted,

I have found the TRansfer Box Low Ratio Detect Switch here www.britishparts.co.uk/products/10229-switch-low-ratio-IGM100000

but still looking for the N detect switch,

My question is where are these located on the car, is there a how to any were on line I am missing?

Thanks again and hope you can help.