View Full Version : Constant Power in engine bay????

04-24-2008, 09:25 AM
Hey there I am looking for a wire that I can tap into that has constant power with ignition on and once ignition is off there would be no power. I need this source to be in the engine bay, I thought I had the wiring diagram for the B5 but I dont and can not find this info, I was thinking into taping into the ignition coil but that would be my last choice any other ideas?

04-24-2008, 09:28 AM
What are you wiring in? Does it draw a lot of current? You could run a wire through the ECU firewall opening to the 75x tap.

04-24-2008, 10:18 AM
The fog lights, as I have to install a relay control and need power to run the module for the DRL's

04-24-2008, 10:48 AM
um, how about the battery?

04-24-2008, 12:26 PM
um, how about the battery?

the battery always has constant power and doesnt turn off with the car so it cant be used to run fogs

04-24-2008, 12:29 PM
um, how about the battery?

Yeah I would run the power source dry then :D thanks

04-25-2008, 07:01 AM
anyone???? Does anyone have the B5 wiring diagrams?

04-25-2008, 07:10 AM
just get a meter and put it on 12VDC and poke around, im sure youll find something.

04-25-2008, 07:31 AM
Run a wire through the ECU firewall opening to the 75x tap and use it to trigger your relay.

FWIW, this is how I ran power to my headlight motors.

04-25-2008, 07:38 AM
wire the relay up inside the car and then just run the wires to the fogs/ DRL, easy to place the realy out of the weather and connect to the x75 and or x30 pins,dependant what you need