Cupillac Posted February 4, 2004 Report Share Posted February 4, 2004 Well I just thought I would let some of you guys know (if you already dont) a key thing to do when storing your Caddy. A real good Cadillac mechanic told me to turn on my lights then unplug the battery when storing your car for awhile. Then when the time comes simply hook the battery back up, turn your lights off, then start your car. If this is not done you take the chance of frying your car's computer. "Cadillac, it's not a car, it's an obsession" -W.Kingdon Link to comment Share on other sites More sharing options...
Bentham Posted February 4, 2004 Report Share Posted February 4, 2004 I've never heard of such a thing - can anyone verify? Thanks for the info! -Eric Eric 93 Cad Seville 100K 95 Chev Blazer 143K [garaged summers] Link to comment Share on other sites More sharing options...
Bob D Posted February 5, 2004 Report Share Posted February 5, 2004 It sounds like what your mechanic is suggesting is to put a resistive load (headlight filaments) 'in front' of the car's computer. What this would accomplish (in theory) is to diminish an inductive transient signal/surge (spike) at first turn onafter storage. The source of this possible 'spike'...who knows? I can't imagine how this preventative measure could harm anything, but it's the first time I've ever heard of it being used in a practical application. '93 STS.. opened, dropped, wide...fast. Link to comment Share on other sites More sharing options...
jschunke Posted February 5, 2004 Report Share Posted February 5, 2004 My guess is that when that battery is disconnected the voltage at the positive terminal is indeterminant or floating and can potentially be at dangerous level due extraneous electro-magnetic fields (EMF). With the lights on the positive electrode is effectively grounded. What you don't want on when connecting/disocnnecting the battery is a fan or any other inductor. One of my quirks is that I place a diode accross my AC compressor electrical connections. Link to comment Share on other sites More sharing options...
KevinW Posted February 5, 2004 Report Share Posted February 5, 2004 One of my quirks is that I place a diode accross my AC compressor electrical connections. There was already a diode in that circuit from the factory, located in the wiring harness, 3 inches from the compressor connector. Older models had one right at the connector. ___________________________________________________ Link to comment Share on other sites More sharing options...
Bob D Posted February 5, 2004 Report Share Posted February 5, 2004 I showed the electrical engineer that did the electrical architecture and electrical integration for the 2000 Deville this and he got a real charge out of it....get it....charge....duh...... Oh man...Have mercy, Agent bbobynski... '93 STS.. opened, dropped, wide...fast. Link to comment Share on other sites More sharing options...
KevinW Posted February 5, 2004 Report Share Posted February 5, 2004 Believe it or not the Cadillac engineers that design the electrical architecture of the vehicle and the electronic components realize that the battery will be hooked and unhooked many many times in the cars life and that vehicles get jump started and such....they even realize that the battery cables can sometimes get crossed or a jump starter may cross the polarity and the components are protected accordingly. I think the best way to appreciate the work that goes into those systems is to design/build a sensitive circuit, then make it live for 10+ years in an automotive environment. ___________________________________________________ Link to comment Share on other sites More sharing options...
Bob D Posted February 5, 2004 Report Share Posted February 5, 2004 My favorite picture is one of a 77 SquareVille that was parked in the EMI chamber with a 12 foot arc of electricity coming down thru the air and striking the roof. The tests have actually gotten much more severe since then. Oh yeah, buddy! That's my kind of stuff!! '93 STS.. opened, dropped, wide...fast. Link to comment Share on other sites More sharing options...
JohnnyG Posted February 6, 2004 Report Share Posted February 6, 2004 Yeah Bob D, looks like that spark hit you on top of the head! Never underestimate the amount of a persons greed. Link to comment Share on other sites More sharing options...
Bob D Posted February 6, 2004 Report Share Posted February 6, 2004 Yeah Bob D, looks like that spark hit you on top of the head! Your'e gettin' warm Johnny.. '93 STS.. opened, dropped, wide...fast. Link to comment Share on other sites More sharing options...
tjtjwdad Posted February 7, 2004 Report Share Posted February 7, 2004 Wouldn't this also reset you computer? I remember when I drove a SHO if the computer needed resetting there was a procedure for which involved disconnecting the battery turn on the light switch amongst other things. Jim White Link to comment Share on other sites More sharing options...
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