2014 Ford Transit Connect cargo van
Boss BE950WCPA - Digital multimedia receiver
I'm almost done installing a new head-unit but I need to locate the "parking brake wire" to finish the connections. In the past everyone just grounded this wire & that was enough to fool the radio into thinking the vehicle was parked. But these modern head-units are smarter than that & require you hook them up correctly. Which is fine, I kinda want to do this properly anyway, no bypassing of the safety lockouts. But... I can't find the blood wire.
Anyone have any suggestions?