All: >From my experience, the hydraulic brake switch brand has more to do with failure than the type of fluid used. When my 300F convert was completed---well, they are never completed, I guess!---I filled the system with the dot 5 silicone fluid. Didn't want to take a chance with the new paint. I think the first switch got us to the Asheville meet and back before "packing it in". The second one didn't do much better, as I recall. Both these switches have an identifying logo of an "S" within what could be a chebby bowtie with the "knot" part rounded instead of squared. I have no idea of the manufacturer, but am sure one or more of you will recognize it. Anyway---I put in a third switch that, if memory serves, I obtained from Andy Bernbaum. Actually bought two. These switches are from a different manufacturer, Fasco Industries, Inc, Rochester, NY, USA. (I guess the F in Fasco could be an "E") These switches have only the male terminal extending above the surface, whereas with the others ("S" brand), the two terminals are the same length. Ok, now to the most important part. After installing the Fasco switch, I proceeded to take apart the failed "S" switch. There was absolutely NO brake fluid residue in the contact area. There is a rubber seal which seems to have done its job. The actual contacts are two spot points and a ring. Reminded me somewhat of a starter solenoid arrangement. The problem seemed to be significant non-conductive buildup on the contact surfaces. Again, I could see NO sign of any fluid. So...that is my experience. The "Bernbaum" switch has been in my car for quite a number of years now, and has made trips to meets in Cleveland, Chicago, Springfield, IL, and Lancaster, PA, at least. So far, works fine. Perhaps my experience will contribute a little more info to our hydraulic brake switch discussions. Oh, yes, we 300F owners do have a little advantage in checking the brake lights. The right rear is very visible from the driver's seat! 300ly, Gil Cunningham Finally some rain in Tallahassee, FL In a message dated 6/28/2011 9:10:11 A.M. Eastern Daylight Time, mmoore8425@xxxxxxx writes: Maybe I'm jinxing MYSELF too, but I'm using DOT 3/4 and I think my brake switch must be 45 years old at least. Mike Moore 300H On Jun 28, 2011, at 6:02 AM, Don Verity wrote: > Maybe I'm jinxing myself here, but I run dot 5 and I've had the same switch in for over 4 years. > 300ly, > Don > ----- Original Message ----- > From: Herb > To: Michael Reed ; Chrysler 300 List > Sent: Monday, June 27, 2011 2:44 PM > Subject: Re: [Chrysler300] Brake Light Switch > > FYI - if your using DOT-5 it's going to destroy your new one in due time, > and purchase several spares for future changes. Plug the line and install a > manual switch by your brake pedal and reroute your brake light wiring. > > > Herb > > 1956 Plymouth Belvedere 361 4-Sale > 1959 Coronet 326 Poly > 1961 Belvedere Custom Suburban Wagon 318 Poly > 1962 Dodge Dart 225 Slant Six 4-Sale > 1963 Fury 2D/HT 6.1L > 1963 Sport Fury Convertible 361 > 1970 Chrysler 300 Hurst 440 > 1979 Dodge Aspen R/T Sport Wagon 360 > 1999 Durango SLT 5.9L > 2008 SRT-8 Magnum 6.1L > St. Louis, MO. > > -------Original Message------- > > From: Michael Reed > Date: 6/27/2011 10:50:38 AM > To: Chrysler 300 Club > Subject: [Chrysler300] Brake Light Switch > > The brake light switch on my "F" has failed. Can someone tell me if the > nipple on the switch is 1/8" thread size? > > I find no auto parts stores listing the switch specifically for a Chrysler > of the era, but it appears that the 1/8" nipple brake light switch is > commonly available. > > Thanks for any help. > > Mike Reed in Lake Odessa, Michigan > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! 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