Quote:
Originally Posted by wileetundra
If you fed the SPG signal back into the vehicle ECU then this could cause a problem with the VSS. Several people made this mistake when wiring up the device or the switch. Make sure the factory speed pulse is disconnected from the NAV and the SPG pulse goes directly into the back of the NAV unit.
Also, make sure you tapped into the speed sensor wire directly behind the NAV unit. On some vehicles the speed sensor also feeds other devices like your audio system, dashboard computer, etc. so if you tap into the speed wire somewhere else then you could be feeding the bogus speed pulse to multiple devices which could cause some problems.
Also, if you removed the SPG and your problem still remains then I don't see how it could be caused by the SPG, unless maybe you fed enough voltage or current back into the VSS circuit to burn it out. If you want to send me your wiring diagram and some photos of your wiring for the switch and SPG then I might be able to help you further. There are nearly 100 of these units in use for all sorts of 2004-2008 vehicles and nobody reported any problems like this so I can't imagine what else it could be other than a wiring issue.
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I've suspected my wiring from the beginning. Never meant to imply otherwise or put you on the defense of your device. I fully intend to re-install it after the VSS is replaced. I'll just be a little more careful on a couple accounts.
My previous ipod "integration" was via FM Modulator that I plugged in to the console cigarette lighter. I was thoroughly dissatisfied with the performance of the FM modulated IPOD device so I didn't really use it much. It had slipped my mind that back when I did use it, I often had to jiggle the cigarette lighter adapter for the Belkin unit to get it to charge the ipod. This is the switched 12v source I selected for the SPG install. I know I wired it correctly but I think the power or ground was intermittent/shorted and somehow jacked up the VSS. I have no issue with taking it to the dealer 'cause they owe me a fix on the cigarette lighter anyway, lol. I'll let you know how I make out.