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Old 04-17-2012, 04:06 PM   #21 (permalink)
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If you want power to fan only when ignitiuon is on, then it is easier to use 12V from ignition (or use fuse box and locate fuse which is powered when ign. is on) and ground. I doubt you'll find switched ground.

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Old 04-17-2012, 05:01 PM   #22 (permalink)
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I'd rather not start cutting into my ignition harness, I already have enough wires going everywhere. Might just use a switched 12v fuse source.
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Old 04-17-2012, 08:10 PM   #23 (permalink)
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I see now why you were asking for a +5V supply.

I don't recommend adding the fan. All you'd end up doing is adding more heat to the unit via regulator power dissipation. High heat on the LCD display itself may cause the image to darken, but it is reversible and true for all LCD's in the hot sun.
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1992 Geo Metro, 1.0L 5spd, 435,000 miles on the original engine and trans!
- knuckles/hubs/brakes/13" wheels from a 2000 Metro
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- self built MPGuino
- http://www.dschmidt.com/MPGuinoJBD.html
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Old 04-18-2012, 12:10 AM   #24 (permalink)
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Thanks for the advice, i will add a screen where the fan would have gone to allow some heat to dissipate.
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Old 04-21-2012, 04:04 PM   #25 (permalink)
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Long story.... but i had the mpguino working and in the box and i took it all out because the hot glue melted all over because it was sitting in the sun. I've since built it into my tach gauge and it looks great. Just need some new tact switches.
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Old 04-21-2012, 04:42 PM   #26 (permalink)
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Bummer. Yeah, hot melt inside a car doesn't work well if the item is in the sun on the dash. Epoxy works well but isn't very reworkable.
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1992 Geo Metro, 1.0L 5spd, 435,000 miles on the original engine and trans!
- knuckles/hubs/brakes/13" wheels from a 2000 Metro
- running 175 70R13
- averaging 51.7 MPG, 56.9MPG best tank.
- self built MPGuino
- http://www.dschmidt.com/MPGuinoJBD.html
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Old 04-21-2012, 05:31 PM   #27 (permalink)
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No worries, I'm much happier with the new install anyways. Pics will come when I get my switches in.
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Old 04-27-2012, 02:44 PM   #28 (permalink)
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Well i haven't got my switches in yet but heres a couple snapshots of the install. Comments are appreciated. I kind of copied another member who did it on his 94 civic coupe, but i think i did it a little cleaner. No light shines from around the display at night. Works great!



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Old 04-27-2012, 09:23 PM   #29 (permalink)
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Wow! Looks great!

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1992 Geo Metro, 1.0L 5spd, 435,000 miles on the original engine and trans!
- knuckles/hubs/brakes/13" wheels from a 2000 Metro
- running 175 70R13
- averaging 51.7 MPG, 56.9MPG best tank.
- self built MPGuino
- http://www.dschmidt.com/MPGuinoJBD.html
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