Jrilla
08-22-2009, 09:50 PM
I just spent an hour reading through fog light threads and I didn't see this exact question: I installed my own fog lights by cutting holes in my 09 Sedan trim pieces and I used the relay in the fuse block method and my own toggle switch to connect pin 3 and 4 on the headlight stalk. Everything works fine, except I din't realize the fogs would only work with the headlights on and would not work with only the parking lights or even the high beams. This is not a big deal, but I would like the option of turning them on anytime the ignition is on. I am pretty sure I would settle for then being able to be turned on when the parking lights are on.
All I have seen so far in my reading has been to skip the connection to pin 3 and 4 and run wires through the firewall. I am perfectly comfortable and knowledgeable of that procedure, and i even found out how to trigger the cluster light if I still want that after abandoning the pin 3 and 4 method.
I guess I am wondering if there is a way to trick the car into thinking the headlights are on, or something like that. I tested pin 3 and 4 and they are constant 12volts+ even with the key off. The only change that happens is one of them (I forget which right now) turns into a ground signal when the headlights are on and only when they are on.
I am very familiar with 12volt wiring, but my problem is I learned it all on my own and I never really learned much theory. My first thought was that all I need to do is ground the wire that changed to ground when the headlights are on, but then I would still need to connect the two wires (3 and 4). There is something wrong with this idea I'm sure, but I think a little more knowledge of the whole setup would help. like what is causing that pin 3 or 4 to change to ground when the headlights are turned on?
Any ideas? If I missed the thread that talks about this, I apologize and if you could point me in the direction of such thread, I would appreciate it greatly.
All I have seen so far in my reading has been to skip the connection to pin 3 and 4 and run wires through the firewall. I am perfectly comfortable and knowledgeable of that procedure, and i even found out how to trigger the cluster light if I still want that after abandoning the pin 3 and 4 method.
I guess I am wondering if there is a way to trick the car into thinking the headlights are on, or something like that. I tested pin 3 and 4 and they are constant 12volts+ even with the key off. The only change that happens is one of them (I forget which right now) turns into a ground signal when the headlights are on and only when they are on.
I am very familiar with 12volt wiring, but my problem is I learned it all on my own and I never really learned much theory. My first thought was that all I need to do is ground the wire that changed to ground when the headlights are on, but then I would still need to connect the two wires (3 and 4). There is something wrong with this idea I'm sure, but I think a little more knowledge of the whole setup would help. like what is causing that pin 3 or 4 to change to ground when the headlights are turned on?
Any ideas? If I missed the thread that talks about this, I apologize and if you could point me in the direction of such thread, I would appreciate it greatly.