Ground problems?
Thread Starter
Rookie
Joined: Feb 2012
Posts: 63
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From: Oklahoma
David, re-read my post, it's not counterfeit, you can take it to the bank. I have experienced it on the RX. Drove me nuts for a while because they all were on. Once I went through and changed all the bulbs one by one, the problem was gone. I have literally thumped 1000's of bulbs, it works! I would rather change on my schedule than the bulbs. Don't kid yourself and put a dark bulb back in, it's on a short string. A good bulb WILL NOT break when thumped (good and hard) and a weak bulb will always break by the 4th thump. Chase your tail if you wish but that's what dogs do, not people. 
(never had a single bulb glass break yet from good hard thumping)
(never had a single bulb glass break yet from good hard thumping)
I do appreciate all the help and replies
David
CL Community Team
Joined: Apr 2001
Posts: 16,559
Likes: 1,385
From: Austin, TX
Salim
Lexus Champion
Joined: Feb 2008
Posts: 1,709
Likes: 16
From: Ca.
I was thinking we are talking about a break in the filament. A direct smash with a hammer is needed to shatter the bulb. The shape gives the glass immense strength. For it to shatter, a sudden change in temperature is the most likely reason. The second would be a problem at the time of manufacture.
Salim
Salim
You are precisely correct, curve gives strength whether metal, glass or other material. A HARD object can easily break the glass but the glass will take all the thumping you want to give it. The filament is the weak point (but ONLY if it is weak) I've thumped GOOD bulbs a dozen times in a row and never broken a filament. I hated having a customer come back a week after you had worked on a car (collision work) and complain that a bulb was burned out. I ALWAYS checked all bulbs for being lit before releasing a car. When I started thumping, the combacks ended for good. And I NEVER put a dark bulb back in even if it passed the thump test because I knew it's days were numbered.
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