Paul G
Well-known member
Both of my fog lights went out at the same time. I thought for sure it was a fuse, or switch or something. But, both bulbs were burnt out at the same time. I replaced the original 34 watt bulbs with the 50 watt bulbs. I noticed that when I have the driving lights on (pull the headlight switch out to the first click, headlights not on yet) and turn on the fog lights, the headlights were glowing dim, and the fog lights were no brighter than before. I pulled out the Helms manual, the schematic shows that the later 88 which I must have, run the fog light current path to ground through the high beam filiment of the headlights. That is why the headlights are glowing dim with the just the fog lights on. The manual shows the early 88 the fog lights go directly to ground. I grounded the lt green wire from the fog lights and they glowed at full brightness.
Anyone know why GM changed this? Can they be switched over to the early 88 configuration?
Anyone know why GM changed this? Can they be switched over to the early 88 configuration?