gamellott Posted March 29 Share Posted March 29 It works, but the backlighting does not work. Occasionally, the lights will illuminate, and I think it's simply a loose ground. The lights are probably original. Last time I looked at them, they're silver in color, and probably ready to give up. OE PN 2754553E00, aren't available in the US and I might be able to import them through Amayama. Has anyone come up with a dimmable replacement LED that could be made to fit? Also... What about the lights on the LCD Clock? Anyone have a replacement for that light? Link to comment Share on other sites More sharing options...
adamzan Posted March 30 Share Posted March 30 (edited) Not sure about the auto climate as mine doesn't have it, but the clock is just a standard bulb, I forget the number but you should be able to find it at any auto parts store. I know I did when mine went. It's just a small wedge bulb that sits in a similar base to the bulbs that light up the gauges. Should be no problem to find a suitable LED from https://www.superbrightleds.com I Edited March 31 by adamzan Link to comment Share on other sites More sharing options...
gamellott Posted March 31 Author Share Posted March 31 Thanks @adamzan. It's been a hot minute since I had the instrument cluster off and I don't want to risk breaking any more plastic repeatedly taking it off. Would like to be one and done, hence the question... Years ago when I replaced all of the lights in the dash because they were burned out, I didn't observe a standard bulb there, otherwise, I would have replaced it... but then... it's been a hot minute... I'll check it out again when I'm ready to tear down other things that take it out of service for a while. The Light for the AC control is similar to a 74 (2723) (Fits a 95 D21 High Center Brake Light) bulb. Might be even smaller. Not sure on where I could even find bulbs by size/dimensions... Whenever I pull it, I'll mic it out... Link to comment Share on other sites More sharing options...
adamzan Posted March 31 Share Posted March 31 I have an extra cluster somewhere, if I find it tonight I'll take it out and post a pic. 1 Link to comment Share on other sites More sharing options...
Slartibartfast Posted April 2 Share Posted April 2 If the clock takes the same bulb as the idiot lights, that may be a tricky one. I struck out when I brought one of those to a parts place to match. That was a long time ago, now I'm thinking about it--not sure if their selection of tungsten bulbs will have gotten better or worse since. Been a while since I had the auto hvac head out of mine. IIRC there's some kind of cover on top, with the bulbs under it? They're run off the same illumination circuit as the rest of the dash lights, and the LEDs I've put in my dash switches dim just fine, so LEDs should work just fine in the HVAC head. Might take some screwing around to get the illumination even, assuming it's got the same light pipe setup as the manual head. Might need some kind of diffuser. I would be a little surprised if the bulbs are a common size that you can find drop-in LEDs for. 1 Link to comment Share on other sites More sharing options...
gamellott Posted April 2 Author Share Posted April 2 6 hours ago, Slartibartfast said: If the clock takes the same bulb as the idiot lights, that may be a tricky one. I struck out when I brought one of those to a parts place to match. That was a long time ago, now I'm thinking about it--not sure if their selection of tungsten bulbs will have gotten better or worse since. Been a while since I had the auto hvac head out of mine. IIRC there's some kind of cover on top, with the bulbs under it? They're run off the same illumination circuit as the rest of the dash lights, and the LEDs I've put in my dash switches dim just fine, so LEDs should work just fine in the HVAC head. Might take some screwing around to get the illumination even, assuming it's got the same light pipe setup as the manual head. Might need some kind of diffuser. I would be a little surprised if the bulbs are a common size that you can find drop-in LEDs for. The light for the HVAC head is not a standard bulb. I did a little search trying to find one by size, and there are a couple of sizes at the T-1.75 or 1.5 size that might squeeze into the socket. Cheap enough, might try it. There wasn't an LED option in that size... or at least from that website. Time permitting, I'll probably start tearing everything down this weekend and update. As far as them not lighting up, I really think there is a loose ground somewhere, because they will light up one day, and not the next. There isn't any consistency and I haven't located the ground for it. Probably just need better lighting for when I take it all apart... 1 Link to comment Share on other sites More sharing options...
Slartibartfast Posted April 3 Share Posted April 3 Could be a wiring fault. Could be the bulb, I've heard of bulbs failing to where the filament sorta swings around and makes contact now and then. Worth noting that the illumination in these does not use a standard ground. The circuit gets positive from the headlight switch and ground from the dimmer (pulse width modulated, I assume). Should be pink/blue and pink/black wires. I would check for power across those at the plug (marker lights on, dimmer turned up) to rule out a harness issue. 2 Link to comment Share on other sites More sharing options...
gamellott Posted April 3 Author Share Posted April 3 (edited) That's the information I'm going to need to see what's what in the circuit. IIRC, There are 2 lights in it, contrary to the parts illustration, and they both go out at the same time when they do work, so I'm sure it's some kind of wiring issue unlike the instrument cluster where one light goes out and comes back on similar to a Christmas tree with blinking lights that travel around the dash. OTOH, if my memory is faulty and there is only one light, it could be a flaky filament that's intermittently making contact. I'll be taking it apart this weekend, or at least starting to pull part of the interior in order to pull the transmission.... that's going to be a load of fun!!! But... some of the last few things to seal up the remaining oil leaks... Edited April 3 by gamellott faulty memory Link to comment Share on other sites More sharing options...
gamellott Posted April 4 Author Share Posted April 4 Update: I got it all apart!! There are 2 lights in the AC head unit. One measures out bad, the other measures out good. Without taking the head unit apart, my guess is that the one good one is just too dim to illuminate it fully. Just a guess. I'm going to try my luck at Amayama to see if I can order some. The clock, as mentioned by @adamzan appears to be a 74, and is bad. The same bulbs are throughout all of the idiot light indications and turn signals, so I might see if I can find an LED that will last being illuminated all of the time. One bad part of this whole tear down is that my Hazards switch exploded when I popped it out of the dash... Gonna have to find a new one... Woe is me.... Link to comment Share on other sites More sharing options...
gamellott Posted April 9 Author Share Posted April 9 Ok... I think I have found out what light bulb is compatible with the socket in the AC head unit. The bulb, 7219 appears to be a viable candidate which only works if you have a good socket to put it in. Amayama is sending one of the lights that comes with a socket. I ordered 4, they're sending 1... I was also able to locate on Amazon LED's that might work well in this application. They populated in the search whenever I typed in the bulb number. Dimensionally, they look like they'll work. Might give those a try as well The LED version of the 74's came in, and they fit the socket perfectly. 1 Link to comment Share on other sites More sharing options...
gamellott Posted Tuesday at 02:56 PM Author Share Posted Tuesday at 02:56 PM Little bit of an update now that I have the full order of parts in: https://www.amazon.com/dp/B00L8BR76A?ref=ppx_yo2ov_dt_b_fed_asin_title https://www.amazon.com/dp/B074SK91BG?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 Both of these options work for the Head unit. The wire leads on the LEDs are a bit beefier than the leads on the incandescent bulbs, but they work. I can now see it in the dark. If you're so inclined, as I was, you can get whatever color to enhance the backlighting. Link to comment Share on other sites More sharing options...
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