The foglights on my 99 ford f150 will not illuminate. I have a yellow foglight light when the switch is pulled out, all the fuses have power, the relay works and I have 11.5v at the pigtails and new bulbs. If i plug one light in, the light does not illuminate and I loose my voltage to the other side. Needless to say, with both new lamps plugged in, no illumination. Does anyone know offhand the proper Sylvania bulb to use? Their book for them just says "multi" and the guy at thr counter looked them up and said they were the 9145's. Does anyone have any idea whats going on, it sounds like it may be the wrong bulb?

 

Traced my wiring up to the power distribution box and found the power wire coming from the foglights kinked. Once I straightened it, basically fell apart in my hand. I enviro spliced it back together, and now the work as advertised. Thank you though.