the fogs never worked in my car (im not original owner).... never really bothered me until recently so decided to tackle the issue....

first i verified the fog bulbs are in good order. second i checked the fog fuses with a volt meter, they seem ok. third i narrowed down the relay to one marked "B" on the engine bay fuse box. now here is the big dilemna...

first i removed the relay and jumped the relay "B" connections with a fuse; that forces the fogs to turn on. i also verified when i press the fog button/switch, i can read 12 volts in the relay connection. so i thought maybe the relay "B" is dead? next i tried stealing the relays from the other 3 spots but no go; cant be failed relay i think, whats the chance the other 3 relays are also bad??!!. cant be the fuses since i can force the fogs on by jumping the pins in the relay connection. cant be a bad fog button/switch cuz i can register 12 volts on the relay "B" connections , when i press the fog button/switch.

any ideas? i verifed fog lights can be forced on; i think this proves it cant be bad bulbs or fuses. i verified fog button/switch pressing "sends" 12 volts to relay "B" connections. stealing the other relays in the relay "B" spot doesnt help. im stumped!

 

is my issue too technical? come on guys!

 

could be the switch to test the switch u need a continuity tester if not just run a new relay my came with no fogs i ran 18g wire and fuse a realy and got a factory switch

 

i kinda figured out i can do my own relay but i rather not bypass it. i want to try to troubleshoot it the correct way; not some ghetto wiring job just to get fogs working...that will be last resort

 

i understand . but my evo didn't come with fog so i made my own harness. it not ghetto when i make harness for a living for swaps. but like i said my friend your going to need a continuity tester that the rite way to test. and if you end up getting tone then the switch is good then you would need a probe tester this is the rite way of trouble shooting it i hope this was a help to you