Originally Posted by 2forme (Post 729332)

Ever think about using the radio dimmer signal wire?

Originally Posted by Sportsguy83 (Post 729269)

Fellow electricity enthusiast, I need help. I have looked at the wiring manual and while I have a general idea about it, I really don't understand everything on it.

I will be installing gauges soon and need to tap my gauges to the cluster lights cable in order to have the gauges dim accordingly. Could some help me figure out which cable I should be tapping into? What about the RPM Tach cable?

While we are here, can I can I crimp the power cables for both gauges together and add them to a single "add a fuse"? Each gauge requires 5A Fuse, so I figured I can use a 10 Amp fuse. Those that make sense or I need to add a separate "add a fuse" for each?

Thanks in advance!

Originally Posted by 2forme (Post 729576)

Well, the gauges that I have in my other car just run full brightness, until the dimmer wire gets juice. I have it piped into my radio harness to handle that....

I guess it depends on the gauge, what do the installation instructions say?

Originally Posted by Dave-ROR (Post 730611)

Mine just illuminate with the illum feed, no dimming. Damn expensive Defi's can't do that unless you go to the newer Advance BF ones.

I pull my feed off the foglight fuse so I can turn off the annoying gauge illumination at night :) The warning light is enough in case there's an issue.

For the fuse, run whatever the load should be. I doubt the gauge really pulls that much. Since mine is control unit based I just needed one feed. In the race car I have them all fed off one power wire with a 5A fuse for 3 autometer gauges. Illumination is pulled off the radio illumination wire.

Originally Posted by 2forme (Post 729332)

Ever think about using the radio dimmer signal wire?

Originally Posted by King Tut (Post 731062)

I have the dimmer wire hooked up properly to my AEM gauge which allows the dimmer circuit to be either 0 to 12v or 12 to 0v. Unfortunetly, the difference in V between dim and not dim is not enough to change the gauge. I would recommend just leaving that wire unhooked. As for RPM, there are a couple wires that you can use:

Pin 17 on connector D48 Gray Wire
Pin 15 on connector A35 Gray/Red Wire

I haven't gotten around to trying either of these yet though.

Originally Posted by Sportsguy83 (Post 731468)

That sucks... do you feel they bother much at night? (Thanks for the RPM signal location)

Originally Posted by King Tut (Post 731516)

Well my gauge just has the not very bright LED screen in the middle since it only shows black and the white number of my boost or vacuum and the lights on the outside for the air fuel ratio, no backlight, so I think it is fine in full bright mode. I can move the dimmer switch and get the gauge to temporarily change to a dimmer mode, but then it comes right back to full brightness shortly afterwards which is weird. I checked the voltage and it definitely changes on that wire when you move the dimmer switch from full bright to no bright.

Originally Posted by Sportsguy83 (Post 729269)

Fellow electricity enthusiast, I need help. I have looked at the wiring manual and while I have a general idea about it, I really don't understand everything on it.

I will be installing gauges soon and need to tap my gauges to the cluster lights cable in order to have the gauges dim accordingly. Could some help me figure out which cable I should be tapping into? What about the RPM Tach cable?

While we are here, can I can I crimp the power cables for both gauges together and add them to a single "add a fuse"? Each gauge requires 5A Fuse, so I figured I can use a 10 Amp fuse. Those that make sense or I need to add a separate "add a fuse" for each?

Thanks in advance!