flyingbrick Posted May 4, 2013 Share Posted May 4, 2013 Hi all. So I'm wiring in my headlight reminder. Having issue with the wire iv chosen to show that acc/ignition is on. I found it by probing with test light. However when turning key to OFF it was not dropping voltage to my circuit unless I use the test light or an led to drain a seemingly residual current. With led on this wire when I turn key to OFF the light will slowly go out over 1.5 seconds or so. It works now with led in parallel but I'd like to know where this electricity is coming from... I'd assume coil but this wire is energised with key in acc position... Indicator flasher modules? Hmmn Quote Link to comment Share on other sites More sharing options...
NVMPAJ Posted May 4, 2013 Share Posted May 4, 2013 It could be an interior light that times out after switch off my galant does this Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted May 5, 2013 Author Share Posted May 5, 2013 Sorry should have been more specific- 81 holden gemini so none of that fancy stuff. Quote Link to comment Share on other sites More sharing options...
be4ver Posted May 5, 2013 Share Posted May 5, 2013 Fans can generate electricity for a second or two when they are spinning down. Could be that? Does the fan go with the key in acc tho? It won't be the indicator flasher I'm pretty sure Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted May 5, 2013 Author Share Posted May 5, 2013 Nah no fans are going. There seems to be some dribbling of electricitys and somewhere something is storing currents because if I disconnect the LED for a few seconds it will recharge- touch wire again and the led will light up and then go out slightly. Fuck knows.. This stuff messes with my head. Discovered the interior lamp is switched negative.. Messed with my head Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted May 7, 2013 Share Posted May 7, 2013 do you have any amps? perhaps the capacitors in there are storing the current (they do this for when the music calls for a big bass hit, there is power ready for it) Quote Link to comment Share on other sites More sharing options...
NVMPAJ Posted May 7, 2013 Share Posted May 7, 2013 Switching the negative is normal , cause one side of the switch can go to ground Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted May 7, 2013 Author Share Posted May 7, 2013 No amps aye. I just can't work it out!! Only thing iv got is the coil?? They switched the negative to make it easy to do all the doors on the interior lamp Quote Link to comment Share on other sites More sharing options...
coldturkey Posted May 7, 2013 Share Posted May 7, 2013 Ok so forget trying to understand how all that black magic hocus pocus works, cause trust me it's a waste of time. What's your actual problem, you can't find an ACC source to switch off the relay for your headlight reminder? Quote Link to comment Share on other sites More sharing options...
coldturkey Posted May 7, 2013 Share Posted May 7, 2013 Or is it that you would like to rewire it without using an LED to pull down the voltage Quote Link to comment Share on other sites More sharing options...
coldturkey Posted May 7, 2013 Share Posted May 7, 2013 I just had a re-read and it sounds a lot like a grounding issue. Are you sure what you are using is the correct ground. Run a wire directly from the battery negative to check. Then measure the potential between that wire and your ground under all situations. Anything other then 0 volts means a problem. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted May 15, 2013 Author Share Posted May 15, 2013 Thanks mate.. I'll check the grounds. Not too worried as its going chuuuur at the moment with that led Quote Link to comment Share on other sites More sharing options...
Frosty Posted May 24, 2013 Share Posted May 24, 2013 Sounds like a capacitor has been fitted to smooth out the power for a stereo or RT. I know the old Alpines used a little black box on the power feeds that had a capacitor and a line filter to suppress electrical noise from the Alternator/Ignition. Caps can hold a charge for ages and a LED doesn't take much power to run for a couple of seconds. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted May 24, 2013 Author Share Posted May 24, 2013 Thanks!!! That's a help! I'll look into it Quote Link to comment Share on other sites More sharing options...
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