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Question about pre-1986 light bulbs for 240 instrument clusters (photo request) 200

posted by  bigscreenbob on  Wed Jan 28 06:25 CST 2009
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last visit: Thu May 31 17:47 CST 2012
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This takes some explaining...

The 240 instrument clusters I'm familiar with are the 1986-93 style where the two upper light bulbs (that pour light into the weird plastic lenses that provide general overhead lighting for all of the gauge faces inside the cluster) are made as part of a twist-lock assembly that locks into the circuit board of the cluster.

You can't just pull these light bulbs out of the base they're a part of; they're built into their own base. (By "base" I don't mean the socket built into the circuit board into which these bulbs twist and lock).

Now, what I'm wondering is this:

- wasn't there an earlier 240 cluster circuit board design where, instead of a twist-lock bulb/socket assembly, the light bulb was a simple wedge-shaped bulb -- where the bulb had no attached base, and it simply fit directly into a separate base, which in turn fit into the circuit board?

If so, what kind of wedge-shaped bulbs are those, and can they be made to work with a 1990 instr cluster circuit board??? And, if so, does anyone have a couple of these they can sell me?

Please PM me if you can send me a photo of these light bulbs and their bases, and what the circuit board socket looks like. I'll PM you my e-mail address.

The reason behind this bizarre inquiry is that i'm investigating a possible easy way to convert those two light bulbs to LED. I know some guys have McGuiver'd LED bulbs in there by soldering in an LED bulb, but I'm looking for another solution.

Thanks!






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