LedZepp_81 Posted February 6, 2009 Report Share Posted February 6, 2009 Hello all, My wife will be purchasing the 90bt next week as a b-day gift for me I now have installed in my 04 f-150 the avh-p5700dvd. My question is, do I need to buy a new wiring harness for the 90bt or with the one already installed work? Thanks Quote Link to post Share on other sites
CamelTowing Posted February 7, 2009 Report Share Posted February 7, 2009 No, just match the colors with the one you have. You may also want to find out where the VSS wire is on your truck Quote Link to post Share on other sites
LedZepp_81 Posted February 9, 2009 Author Report Share Posted February 9, 2009 Cool..thanks for the reply. From what I've read on the VSS wire, it's the Gray/Black pin 14 on the radio harness, in case others need to find it Quote Link to post Share on other sites
jerros Posted February 9, 2009 Report Share Posted February 9, 2009 Unless your car came with a built in nav system it's unlikely that the VSS wire, reverse wire or break wire will be integrated into the wiring harness. Which means you'll need to do a bit of research to locate them. You also asked if you would need a new wiring harness. You don't "need" one if you already have an aftermarket stereo installed. If not you'll have to go buy one (I suggest walmart, the price for the harness is around $7.00). I'd do the majority of the wiring in the house because it's simply easier than being upside down in a car with a flashlight trying to find the right wires. Quote Link to post Share on other sites
LedZepp_81 Posted February 9, 2009 Author Report Share Posted February 9, 2009 Yeah I already have an after market installed. For the VSS, I haven't personally opened up the dash and looked at it, but apparently (at least for the newer F-150's) it's located in the stock wiring harness. It didn't have a stock Nav system installed, but it does have that option were the stereo volume increases as you speed up/down. So I'm assuming that is why the VSS wire would be in that location. Quote Link to post Share on other sites
paQ Posted February 9, 2009 Report Share Posted February 9, 2009 What does the Illum wire actually do? DAY and NIGHT modus go automatically on local time... Does the illum wire only take care of how bright the buttons are lit? Quote Link to post Share on other sites
CamelTowing Posted February 9, 2009 Report Share Posted February 9, 2009 And how bright the LCD is What does the Illum wire actually do?DAY and NIGHT modus go automatically on local time... Does the illum wire only take care of how bright the buttons are lit? Quote Link to post Share on other sites
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