I installed the Vaistech module a month ago and had to completely remove the center stack (nav, radio, etc). I thought I connected everything back up but there was a lot of wires. My nav loses where I am very quickly now and I have to relocate it. It did not used to do that so I think I may have missed a connection. I cannot seem to find a diagram of the back connections. I have an 08 IS-F with the Levinson sound.

Is the the small gray squarish connector on the lower middle left (as you look at the back of the stack devices/connections)?

 

have a look through this lengthy thread as I recall there might be some pics that might help,

https://www.clublexus.com/forums/is-...rom-vline.html

also this thread has got rear of nav pics,

https://www.clublexus.com/forums/is-...le-moving.html

 

You may have missed the Nav aerial connector. It's a single wire (black, from memory) that often gets left unconnected - don't ask me how I know.
Pull out the unit again and have a look for a single stray wire. The connection point on the back of the unit will be obvious.

Dec.

 

Solved. Thanks for the responses. Yes, it was the black wire, gray connector. Once I did that the "GPS" under the compass came back and it is perfect. If the cable isn't connected the "GPS" is not there.

 

Glad it was a simple oversight and was easily fixed!