i need some electrical help fast please!!

supradaddy0803 · 07-13-2007, 07:17 PM

Ok if you want them to come on when you turn on your head lights then hook them to your dimmer switch the reason for this is it gets its power only when the head lights are on. I was wrong before though hook the red wire to the solid green wire on the dimmer switch this will allow for when you turn on your head lights the lights on the gauges will come on. If you want the lights on the gauges to comeon all the time as soon as you tunr on the ignition then hook into your EFI fuse then when you turn the key the fuse gets hot and the lights will come on. I hope this helps if you have any more questions then post away.

gpgtp_22 · 07-13-2007, 09:06 PM

if you want to tap into the back go to ign+ and earth that would be your ground or ign- should work the same too

cre · 07-14-2007, 07:31 AM

I wouldn't recommend powering the EL inverter via the soft circuit on the back of the cluster. They're old, and were only designed with a certain tolerance above "normal" in mind. I've seen them burn up from people simply tapping one line for a few additional LEDs.

I also advise against anyone trying to use the stock dimmer's output (white wire w/ green stripe) to power and/or control EL gauges. There have been a few different revisions of the internals of the dimmer, none of which can support a much heavier load. Additionally about half the dimmer's I've see supply a gradiated ground and the others supply a gradiated positive signal (these are a potential divider. Simply put, if your ground is at 2v and your + is at 12v the circuit in between actually sees 10v.). Also, if you've got the latter of the two the scale is the opposite. A light fed a + from the w/g wire will brighten as the rest of the gauges are dimmed.

A further reason not to use the dimmer's output as a positive signal is that you may create a low resistance ground path for the rest of the gauge lighting and the dimmer. Depending on which type of dimmer you have you can damage the dimmer or the newly added device.

To wire them to come on with the taillamp circuit supradaddy0803 is right, use the solid green wire which supplies the dimmer for your positive and the white wire w/ black stripe for the ground.

zuni · 07-14-2007, 05:23 PM

thanks everyone i got them in and there working great. i used the green wire on the stock dimmer switch to power my new gauges. however i grounded the ground wire to a bolt back in the dashboard that was connected to a big pice of tubed steel and it works great. thanks to you all once again.

Quote:

Originally Posted by cre

I wouldn't recommend powering the EL inverter via the soft circuit on the back of the cluster. They're old, and were only designed with a certain tolerance above "normal" in mind. I've seen them burn up from people simply tapping one line for a few additional LEDs.

I also advise against anyone trying to use the stock dimmer's output (white wire w/ green stripe) to power and/or control EL gauges. There have been a few different revisions of the internals of the dimmer, none of which can support a much heavier load. Additionally about half the dimmer's I've see supply a gradiated ground and the others supply a gradiated positive signal (these are a potential divider. Simply put, if your ground is at 2v and your + is at 12v the circuit in between actually sees 10v.). Also, if you've got the latter of the two the scale is the opposite. A light fed a + from the w/g wire will brighten as the rest of the gauges are dimmed.

A further reason not to use the dimmer's output as a positive signal is that you may create a low resistance ground path for the rest of the gauge lighting and the dimmer. Depending on which type of dimmer you have you can damage the dimmer or the newly added device.

To wire them to come on with the taillamp circuit supradaddy0803 is right, use the solid green wire which supplies the dimmer for your positive and the white wire w/ black stripe for the ground.

07-13-2007, 07:17 PM	#1
supradaddy0803 12psi boost Join Date: May 2006 Location: Athens, TX Posts: 308	Ok if you want them to come on when you turn on your head lights then hook them to your dimmer switch the reason for this is it gets its power only when the head lights are on. I was wrong before though hook the red wire to the solid green wire on the dimmer switch this will allow for when you turn on your head lights the lights on the gauges will come on. If you want the lights on the gauges to comeon all the time as soon as you tunr on the ignition then hook into your EFI fuse then when you turn the key the fuse gets hot and the lights will come on. I hope this helps if you have any more questions then post away. __________________ 1987 supra NA 5 speed 1JZGTE swap Tokico Illumina 2 and Eibach springs Tokico pillow blocks Suspension Techniques front and rear sway bar HKS super dragger cat-back exhaust plus test pipe Greddy Profec B spec 2 boost controller HKS type 1 turbo timer Supra sport solid steel drive shaft Walboro 255 fuel pump JZA70 Front end mod 18" Volk Racing AV3 18x8.5 front 18x9.5 rear

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07-13-2007, 09:06 PM	#2
gpgtp_22 3" Exhaust Join Date: Jan 2006 Location: Wisconsin Posts: 80	if you want to tap into the back go to ign+ and earth that would be your ground or ign- should work the same too

07-14-2007, 07:31 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I wouldn't recommend powering the EL inverter via the soft circuit on the back of the cluster. They're old, and were only designed with a certain tolerance above "normal" in mind. I've seen them burn up from people simply tapping one line for a few additional LEDs. I also advise against anyone trying to use the stock dimmer's output (white wire w/ green stripe) to power and/or control EL gauges. There have been a few different revisions of the internals of the dimmer, none of which can support a much heavier load. Additionally about half the dimmer's I've see supply a gradiated ground and the others supply a gradiated positive signal (these are a potential divider. Simply put, if your ground is at 2v and your + is at 12v the circuit in between actually sees 10v.). Also, if you've got the latter of the two the scale is the opposite. A light fed a + from the w/g wire will brighten as the rest of the gauges are dimmed. A further reason not to use the dimmer's output as a positive signal is that you may create a low resistance ground path for the rest of the gauge lighting and the dimmer. Depending on which type of dimmer you have you can damage the dimmer or the newly added device. To wire them to come on with the taillamp circuit supradaddy0803 is right, use the solid green wire which supplies the dimmer for your positive and the white wire w/ black stripe for the ground.