Posted by Jim L. in OR On 2015/2/11 21:32:00
Quote:
HH56 wrote:
Body feed fuse also feeds the brakes on a 55. It does sound like something in the TL control or the on/off switch under dash has a problem and is causing the blown fuse but for kicks also look carefully for a damaged wire or something loose in the brake light wiring in the trunk. Some typical places others have had problems in the trunk have been at the lamp sockets where something may have been placed in the trunk and hit and pinched the wire as it enters the socket or in the small trough at rear of floor just below the trunk lid opening where the wires cross over to the right side. If insulation has gone missing somewhere then vibration can cause intermittent fuse blowing.
Howard, I believe you nailed it with the T-L "On-Off" switch. I checked everything else you and Ross and O_D suggested but found nothing until I came to the switch. I noticed that the "toggle" seemed a little loose and sloppy. Fortunately, when I first bought this car, there was an eBay auction for a NOS T-L Switch ( I believe it was also used as the Heater Blower Switch on the 51-54 models). Comparing the two, I could see that the NOS switch toggle was much more positive in it's action. So I replaced it. That was two weeks ago, that the Courtesy Lights still work as designed so I cautiously say that the mystery is solved. I tested the old switch with an Ohm Meter and at times got a reading that seemed to indicate a "leak".
My thanks to Howard, O_D, Ross and others who helped me through this. It's taken a long time, but I think I can cross this one off. At least for a while.
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