factory fogs on a ram st
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Registered User
Joined: Mar 2010
Posts: 13
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From: Texas
factory fogs on a ram st
so i ordered the factory fogs, switch, wiring harness and all the stuff that was needed. hooked them up and once i pushed in the fog light button, nadda. is there anything i should do to find out why nothings lighting up? thanks
Professional
Joined: Aug 2006
Posts: 116
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From: Mission, BC
I beleive for the 06 and newer RAMs you need the option activated in the computer for the factory fogs to work. My 04 was just plug and play, but I have read elsewhere the newer ones require the program change. Dealer or someone with the factory programming tool is the next step I think.
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Registered User
Joined: Mar 2010
Posts: 13
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From: Texas
crap, well it already had a wire that ran from the bumper to the dash so all i did was add the wiring from the dealership that goes to the two lights and change out the switch to the one that activates the fogs. how much would a factory programming tool cost or where could i find one of these?
Rookie
Joined: Aug 2009
Posts: 90
Likes: 2
From: Amarillo
You'll have to go to a dealership and have them program it for you. I looked into this a while back and the guy I talked to at the dealer said it would have to be programmed by them and I didn't really think that was necessary but now I guess it is true.
Champion
Joined: May 2009
Posts: 2,732
Likes: 1
From: La Union, Philippines
I'm guessing you don't have the fog relay in the PDC from the factory. If your truck didn't come with the fog light option then they wouldn't install the power relay. My SXT doesn't have any wiring for add-on's. I don't know about the newer trucks. This is from the manual;
Good luck...
OPERATION
The front fog lamp relay is an electromechanical
switch that uses a low current input from the Front
Control Module (FCM) to control a high current output
to the front fog lamps. The movable common feed
contact point is held against the fixed normally
closed contact point by spring pressure. When the
relay coil is energized, an electromagnetic field is
produced by the coil windings. This electromagnetic
field draws the movable relay contact point away
from the fixed normally closed contact point, and
holds it against the fixed normally open contact
point. When the relay coil is de-energized, spring
pressure returns the movable contact point back
against the fixed normally closed contact point. A
resistor is connected in parallel with the relay coil in
the relay, and helps to dissipate voltage spikes and
electromagnetic interference that can be generated as
the electromagnetic field of the relay coil collapses.
The front fog lamp relay terminals are connected
to the vehicle electrical system through a connector
receptacle in the Power Distribution Center (PDC).switch that uses a low current input from the Front
Control Module (FCM) to control a high current output
to the front fog lamps. The movable common feed
contact point is held against the fixed normally
closed contact point by spring pressure. When the
relay coil is energized, an electromagnetic field is
produced by the coil windings. This electromagnetic
field draws the movable relay contact point away
from the fixed normally closed contact point, and
holds it against the fixed normally open contact
point. When the relay coil is de-energized, spring
pressure returns the movable contact point back
against the fixed normally closed contact point. A
resistor is connected in parallel with the relay coil in
the relay, and helps to dissipate voltage spikes and
electromagnetic interference that can be generated as
the electromagnetic field of the relay coil collapses.
The front fog lamp relay terminals are connected
to the vehicle electrical system through a connector
Good luck...
Last edited by RedTruck-VA; Mar 5, 2010 at 03:14 AM.
All Star
Joined: Apr 2009
Posts: 766
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From: Jacksonville, NC
ya as said before, you one of the unlucky ones and need to go to the dealership so they can activate them.
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Champion
Joined: May 2009
Posts: 2,732
Likes: 1
From: La Union, Philippines
I would first pull the cover on the PDC and see if there is a relay installed. If the wiring was provided then it would hopefully be nothing more than installing the proper relay. I wanted to have control over when I could use my fogs so I installed a small rocker switch on the dash and hot wired an 30 amp relay to operate the factory fogs. I use mine for daylight running lights.
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Registered User
Joined: Mar 2010
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From: Texas
so i took a few pictures of the setup i connected and the fuse box. not sure which slot the relay is supposed to go in because the ding dong that owned my truck before me took the owners manual, and the cover is a bunch of jibberish to me
http://s1042.photobucket.com/albums/b423/mkenyon91/
http://s1042.photobucket.com/albums/b423/mkenyon91/