|
08-22-2009, 08:50 PM | #1 |
Drives: 09 Yaris 4Dr Sedan Join Date: Aug 2009
Location: Fargo, ND
Posts: 20
|
Sorry! Another fog light question.
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. |
08-22-2009, 10:02 PM | #2 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
|
This was discussed a while back in a fogs with high beams thread, but the simple answer is take the wire from your switch off of pin 4 and go straight to ground with it (leave the other on pin 3 though). This will bypass the DRL module and the logic for fogs only on with low beams.
|
08-23-2009, 01:36 PM | #3 |
Drives: 09 Yaris 4Dr Sedan Join Date: Aug 2009
Location: Fargo, ND
Posts: 20
|
Thanks. Just to clarify, will the switch be in complete control of the fogs then regardless of the ignition being on or off?
|
08-23-2009, 01:54 PM | #4 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
|
|
08-23-2009, 02:25 PM | #5 |
Drives: 09 Yaris 4Dr Sedan Join Date: Aug 2009
Location: Fargo, ND
Posts: 20
|
OK, thanks for the help. I will either keep it the way it is, or if I decide I want the option of turning them on with the parking lights or high beams I will just put a relay inline on the ground wire to the switch that either closes the circuit when the parking lights are on or maybe I'll use the ignition as the trigger so I can use the fogs as daytime running lights if I want.
Thanks again for the help. |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
DIY (08' USDM Liftback): ESUSE Fog Light Install v2.0 | goku87 | DIY / Maintenance / Service | 127 | 02-19-2023 07:01 PM |
Question about Yaris 2009 fog light? | JAyala | Cosmetic Modifications (Exterior/Interior) | 0 | 02-07-2009 03:51 PM |
DIY:Day time running light Disabled with stock fog light remain function | summergxz | DIY / Maintenance / Service | 12 | 09-26-2007 10:42 AM |
fog light lens question? | Adriaan | Cosmetic Modifications (Exterior/Interior) | 0 | 04-13-2007 11:30 AM |
question on Fog light | clfile | Cosmetic Modifications (Exterior/Interior) | 6 | 11-09-2006 07:11 PM |