Fog Light Questions

[scottmcd]

Changed my RS fog light bulb and wouldn't come on, but DS light did, 2 days later DS bulb goes out, changed it and nothing.



Could it be a fuse or coul;d it be the Fogzilla/Brite Box wiring? The light switch in the cab shows that it is on!

 

[seafish]

The Fogzilla Harness is only a simple short bulb socket adapter, it is unlikely that something happened there.



First, check for actual voltage at each foglight bulb socket??



If voltage is good, then you got bad bulbs for some reason.



If no voltage, check the foglamp fuse, sorry don't know the number offhand, should be in the owners manual...



If fuse is OK, then unplug the Britebox and go back to stock lighting...



Thogh not too ofetn, there HAVE been reported cases of their failing.



If it IS bad, and you do not want to have to get another, try this mod...



https://www.turbodieselregister.com...31-bombed-multifunction-high-beam-switch.html

 

[steved]

He indicated he had a bright box, and that does keep everything on doesn't it??

 

[seafish]

He indicated he had a bright box, and that does keep everything on doesn't it??

Yes but the BriteBox is not much more then a relay or two inside a box that uses the voltage from the oem headlights to switch power also to the foglights and also low beams when the foglight switch or high beam is on. There have been cases of the Briteboxes overheating and failing and then who knows what voltage is going where.

I don't say this to badmouth BriteBox, but only to explain that maybe that is where the problem lies. But you are right, the absence of voltage at the foglight bulb socket, could mean either a bad fuse or a bad britebox. At least I think so... .

Voltage at the sockets, but no light, of course, would definitely mean bad bulbs, which also does happen.

 

[scottmcd]

thanks for all the replies and the link to the BOMB Seafish & Bighammer did a few years back. will be getting hrt into the garage today and try to figure it out.