Fog light wiring?
05-13-2009, 11:35 PM
#2
3rd Gear Member
Join Date: Dec 2008
Location: CA
Posts: 588
05-14-2009, 02:09 AM
#5
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
Did I hear a bell ring?
Leaving aside that there's no practical reason to have fog lamps and brights on at the same time--there is a relay conveniently placed in the battery junction box (relay #1), named the Fog lamp cutoff relay (makes sense) that does the dirty deed...
This relay is energised when the brights are on or flashed, and when energised it cuts the fog lamp relay's ground circuit, via its pins 3 and 4--so all one has to do is remove that relay and jumper pins 3 and 4 to keep the fog lamps on during bright operation.
Here's what the relay socket looks like:
Pin 3 uses 1/4" spade connector, pin 4 a 3/16" spade. As all that is being switched is the fog lamp relay's coil you can use 18 ga. wire with no problems.
Leaving aside that there's no practical reason to have fog lamps and brights on at the same time--there is a relay conveniently placed in the battery junction box (relay #1), named the Fog lamp cutoff relay (makes sense) that does the dirty deed...
This relay is energised when the brights are on or flashed, and when energised it cuts the fog lamp relay's ground circuit, via its pins 3 and 4--so all one has to do is remove that relay and jumper pins 3 and 4 to keep the fog lamps on during bright operation.
Here's what the relay socket looks like:
Pin 3 uses 1/4" spade connector, pin 4 a 3/16" spade. As all that is being switched is the fog lamp relay's coil you can use 18 ga. wire with no problems.
Last edited by cliffyk; 12-12-2012 at 10:49 AM.
05-14-2009, 06:15 AM
#6
Retired Moderator
Join Date: Jun 2006
Location: SF Bay Area
Posts: 9,235
I have done this mod a couple years back and here is a "how to" thread
'99~'-04 foglight install
Jazzer
EDIT: cliffyk's post is correct and is great info
'99~'-04 foglight install
Jazzer
EDIT: cliffyk's post is correct and is great info
Last edited by Jazzer The Cat; 05-14-2009 at 06:29 AM.
05-14-2009, 09:24 AM
#7
Banned
Thread Starter
Join Date: Sep 2008
Location: tn
Posts: 0
Thanks guys.
The reason I am doing this cliffy is when I drive I watch the road just infront of the car for dabree and crap since my damn tires cost so much and I have alot of additional lines running under the car that I don't want hit.
The reason I am doing this cliffy is when I drive I watch the road just infront of the car for dabree and crap since my damn tires cost so much and I have alot of additional lines running under the car that I don't want hit.
05-14-2009, 10:36 AM
#8
5th Gear Member
Join Date: Mar 2008
Location: PA
Posts: 2,825
Did I hear a bell ring?
Leaving aside that there's no practical reason to have fog lamps and brights on at the same time--there is a relay conveniently placed in the battery junction box (relay #1), named the Fog lamp cutoff relay (makes sense) that does the dirty deed...
This relay is energised when the brights are on or flashed, and when energised it cuts the fog lamp relay's ground circuit, via its pins 3 and 4--so all one has to do is remove that relay and jumper pins 3 and 4 to keep the fog lamps on during bright operation.
Here's what the relay socket looks like:
Pin 3 uses 1/4" spade connector, pin 4 a 3/16" spade. As all that is being switched is the fog lamp relay's coil you can use 18 ga. wire with no problems.
Leaving aside that there's no practical reason to have fog lamps and brights on at the same time--there is a relay conveniently placed in the battery junction box (relay #1), named the Fog lamp cutoff relay (makes sense) that does the dirty deed...
This relay is energised when the brights are on or flashed, and when energised it cuts the fog lamp relay's ground circuit, via its pins 3 and 4--so all one has to do is remove that relay and jumper pins 3 and 4 to keep the fog lamps on during bright operation.
Here's what the relay socket looks like:
Pin 3 uses 1/4" spade connector, pin 4 a 3/16" spade. As all that is being switched is the fog lamp relay's coil you can use 18 ga. wire with no problems.
Ha I knew you'd know
05-19-2009, 05:11 PM
#10
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
If so, there is no logical reason for doing so, and one big physiological reason for not doing so (they do have engineers design these things)...
Having both the low and high beams on ("dipped" and "brights" for my mother's clan) will create a bright spot in the foreground that will cause you pupils to close and render the long distance effectiveness of the high beams virtually useless--and unsafe to boot.
This is a different request from the fellow who wanted to leave his OEM 27.5W "toy/cosmetic*" fog lights on, it is possible but I won't tell you how...
--------------------------
* - In Europe the Philips catalog described the #899 27.5W lamp as a toy/cosmetic fog/driving lamp--I love it, that's exactly what it is...
