Read this morning that Subaru is recalling over a million vehicles for brake light failure.
Quote:
Subaru says cleaning products containing silicone can emit a gas that can seep into the brake lamp switch and cut off the electrical contact. That can stop the brake lights from working but brakes will still function.
Haven't really studied brake switches to know their construction and what kind of barrier separates the fluid from the electrical section -- suspect some kind of rubber -- so this theory is probably more in Owen_Dyneto's field of expertise. Seems logical to me that if Subaru is having the problem with their cars from vapors off a cleaning solution used at some point getting thru a barrier then the relatively fast failures of switches used in our Packards that have been converted to silicone fluid could be laid to a constant emission of vapors coming from the silicone fluid doing the same thing.
The article did not say what Subaru is going to do in correcting the problem but would imagine they have a switch replacement of some kind that is impervious to the vapor.
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