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Posted by Chris Case @ San Diego on Friday, March 21, 2008 at 23:24:54 :
In Reply to: Light bulb (from last forum) posted by Nick on Friday, March 21, 2008 at 23:13:57 :
That is why there are seven wires in a signal switch.
The problem comes when you try to run the turn/brake lights on your trailer from one of the cars that use separate bulbs/filaments. Then you need a gismo in the trailer harness, usually under the bumper of the car. I suspect it is just 4-6 diodes that would cost $5 retail at Radio Shack, or buy the gismo at the parts store for $29.