Quote:
Originally Posted by rastaFarai
So when i plug in the module (not knowing i didnt have ulf or what tcu was ) everything goes blank. Is this likely if there are issues with older models using the TCU? Essentially if this is an older harness it goes back to older model in terms of wiring correct?
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If plugging in the TCU is causing the nav screen to shut down, then it can only be affecting the power supply, and must be blowing a fuse.
Check what fuse blew, that will tell you which wire on what pin is the issue at the moment, compare with WDS and correct the wiring. If the wiring is correct and the TCU blows a fuse, the TCU must be faulty.
If your description of "shut down" means something else, then please be more descriptive so we can understand what is happening.
Maybe the databus is being blocked by the TCU, and that would mean you would have no control or display of any data.