PGB BME Posted February 7, 2021 Report Share Posted February 7, 2021 I’m trying to repair/ refurbish my TR250 gauges. I’ve stripped the temperature gauge and found the blue plastic bulb diffuser to be broken (hole), can you get replacements anywhere or could I just install a coloured bulb and do without the diffuser? Phil Quote Link to post Share on other sites
Tom B Posted February 7, 2021 Report Share Posted February 7, 2021 There has been quite a bit of traffic on this issue. The instrument lights are, in general, very poor. Probably the best modern option is to remove the diffuser entirely and replace with LEDs - these can be bought coloured or white or warm white (classiccarleds ...). Note that the rheostat will not work with LEDs - you will have to replace it with a PWM unit (easier than you may think, message me if you require details of how to do this). An option is just to short the rheostat wiring. The diffusers do seem to suffer over time and if there has been a bulb problem they go brown/black/break. Quote Link to post Share on other sites
JohnC Posted February 8, 2021 Report Share Posted February 8, 2021 Just replaced the high beam, oil light and indicator warning lights in my TR6 with coloured LEDs from Classic Car LEDs. The diffusers have deteriorated, but the replacements are still brighter than the old white bulbs. Worthwhile, and if your diffusers are stuffed then a simple and cheap fix. John Quote Link to post Share on other sites
Mk2 Chopper Posted February 8, 2021 Report Share Posted February 8, 2021 (edited) On 2/7/2021 at 12:16 PM, Tom B said: Note that the rheostat will not work with LEDs - you will have to replace it with a PWM unit. Of course most don't require the rheostat dimming function, and the LED's will work with the rheostat in place if its put at the maximum brightness position. Gareth Edited March 11, 2021 by Mk2 Chopper Spelling Quote Link to post Share on other sites
Kenrow Posted February 12, 2021 Report Share Posted February 12, 2021 If you don’t want to go the led route I believe I have some diffusers in my spare part bundle. PM me if interested... Quote Link to post Share on other sites
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