Which wire?

Just go under bumper find hot wire for fogs splice into it and splice into the parking lights. Can be done with a 1' wireEasier to be done then that

SM-N920V ?



SM-N920V ?

 

Not entirely sure about that. The parking light circuit might have a floating ground IIRC.

What this means is that the parking light circuit +12v wire is always hot, and the switch is on the ground side of the circuit. OP, the wire you are referencing under the dashboard is the brown wire in the wiring harness. It is hot only when the parking lights and lowbeams are on. It is a very low power wire, so it will only be used to control a relay, power for the circuit must be sourced from somewhere else.

The location of this brown wire can be found in the gen3 oem foglights available sticky thread in the accessory and modifications forum here on priuschat. There is a link to installation instructions in the first post.

 

If it was always hot by the light it would always be on..... rethink your statement.... all the lights are hooked on a relay no power goes to the bulbs until the switch is turned on each light bulb has two wires.... find the one that is hot when activated then just hook to the fog lights I do the same thing on my truck for offroad ditch lights and high beams

SM-N920V ?

 

Reread my post, a floating ground circuit has a switched ground wire. Google is your friend...

 

Experience is the key

SM-N920V ?

 

What exactly does this mean?

I've done a lot of wiring mods on my cars... see my highbeam DRL mod link in my signature below. It's actually a little outdated, as I've taken out the DRL module and replaced it with a different one since. I found the DRLs too bright using the module, so I then modified the output to switch from a parallel to a series circuit while in DRL mode, then back to a parallel circuit while in highbeam mode using relays.

I also installed the oem foglights, with the associated the wiring harness, so that's where the advice regarding the brown wire under the dash came from.

Is your truck a Toyota? If not, then you may be giving out bad advice.

 

Whatever do what you want make it as complicated as possible... I'm not one to argue . I added fog lights to my car and are off of the parking lights on my 2010 prius... but ey I don't know what I am talking about...

SM-N920V ?

 

If there were no additional relays installed and power is coming off the parking light circuit, then yes, you don't know what you are talking about...

You added the foglights [7.6 amps load = (55w x 2 bulbs) at 14.4v] to the parking light circuit [1.4 amps load = (5w x 4 bulbs) at 14.4v], that is a recipe for blown fuses or overheated wiring/fire hazard. On the other hand, if you are getting power for your foglights from the fuse box, and using the parking light circuit to trigger a relay that controls the foglights, then you are OK.

 

Dude u use the accessory wire to connect you know the one that goes to the relay not the one that is going an actual power source.... think about it you are just using the parking lights to turn the fogs on and powering them .... do I have to draw you a diagram with some crayons for you to understand?

SM-N920V ?

 

No need for the condescending attitude, dude. I fully understand how to properly use relays, you never once mentioned any relays in your post.

The OP has oem factory foglights, we have oem style aftermarket foglights with a separate relay /wiring harness. There is a big difference. Your post made it sound like you were advising them to take the foglight +12v hot wire and take power from the parking light +12v hot wire to power the foglights.

 

Yes, but i thought relays was a given tho....

SM-N920V ?

 

I'll let mr. Technical give u that answer

SM-N920V ?

 

No, by all means go ahead... since the OP interpreted your response exactly as I suspected.

To the OP, no, that is not the proper, or safe way to do it.

 

Well, it looks like trip1027 can't find his crayons.

OP, if you still want to do this, then the easiest way is to wire your foglights with something like this:

http://pages.ebay.com/motors/link/?nav=item.view&id=131544140033&alt=web

Follow the wiring directions in the item description, where step #5 is where you tap into the parking light wire for your relay trigger wire.

So basically, you will be taking power from the battery (or fusebox) for the battery +, and the wire that goes to negative battery terminal is just any good ground point/bolt.

Cover your oem foglight connectors on your original wiring harness with some plastic bags and rubber band them to keep water out of them. You won't be using them anymore.

 

You would need another switch, if you want to be able to turn the foglights off when the parking lights are on. Otherwise, the foglights would be on anytime the parking lights are on, which is what you wanted in the first post.

 

Any chance you are able to show a pic of your fog light switch

SM-N920V ?

 

Sorry been trying to find that on the Internet while also changing out my pcv valve know my 10 prius sorry I don't just sit around reading things like some

SM-N920V ?