This is a bit long-winded, so sorry in advance; I just want to thoroughly describe the issue at hand.
So my Supra decided that I was getting too complacent in its reliability. After running around town taking care of errands today, the backlights for both the instrument cluster and the climate control go out entirely when heading home. Indicator lights on the climate control as well as the temperature display are out. The blower controls still work, exterior lights were all still functional.
I checked the dimmer control and it affected nothing. All the indicator lights in the dash (TEMS, ABS, CEL, high beam, turns, etc etc etc) still worked. Indicator light for cruise control did not. Defroster indicator still worked. The weird thing I noted was the hazard switch backlight was on but very dim as though it was getting far below normal voltage. During the last leg home, the gauge backlights flickered a couple times but didn't stay on. I let her sit a while.
A couple hours later I came back and fiddled with the combination switch. Now the backlights were working just fine, but not due to anything I did as far as I can tell. The climate control backlights came back...but only in "on" mode. As soon as the engine starts, they go out. Instrument backlights still working when the engine is on. And to add to it, if the headlights are off, the indicator lights and temp display on the climate control will work, but they go out the moment headlights are turned on. The dimmer control does work...for the lights that still work anyway.
So, I'm fairly certain it's not a fuse, since that would just kill it entirely, rather than this random functionality nonsense. I have not done any electrical work to the Supra. I didn't recently take anything apart, put anything together, add nor remove anything physical or electrical.
As a note: I did convert the dash lights to a blue LED theme, with the hazard switch in red. The climate control is also in a blue LED theme. But the instrument cluster and switches were done a year ago. The climate control was converted about 4 months ago, so I'm not seeing those changes as a likely cause. This is irritating me as it's being very random about it, so I'm not exactly sure where to start looking. Any ideas?
Cliff Notes: LED converted dash/climate control. Worked fine for a year, now going schizo with respect to when they work and then they don't.
So my Supra decided that I was getting too complacent in its reliability. After running around town taking care of errands today, the backlights for both the instrument cluster and the climate control go out entirely when heading home. Indicator lights on the climate control as well as the temperature display are out. The blower controls still work, exterior lights were all still functional.
I checked the dimmer control and it affected nothing. All the indicator lights in the dash (TEMS, ABS, CEL, high beam, turns, etc etc etc) still worked. Indicator light for cruise control did not. Defroster indicator still worked. The weird thing I noted was the hazard switch backlight was on but very dim as though it was getting far below normal voltage. During the last leg home, the gauge backlights flickered a couple times but didn't stay on. I let her sit a while.
A couple hours later I came back and fiddled with the combination switch. Now the backlights were working just fine, but not due to anything I did as far as I can tell. The climate control backlights came back...but only in "on" mode. As soon as the engine starts, they go out. Instrument backlights still working when the engine is on. And to add to it, if the headlights are off, the indicator lights and temp display on the climate control will work, but they go out the moment headlights are turned on. The dimmer control does work...for the lights that still work anyway.
So, I'm fairly certain it's not a fuse, since that would just kill it entirely, rather than this random functionality nonsense. I have not done any electrical work to the Supra. I didn't recently take anything apart, put anything together, add nor remove anything physical or electrical.
As a note: I did convert the dash lights to a blue LED theme, with the hazard switch in red. The climate control is also in a blue LED theme. But the instrument cluster and switches were done a year ago. The climate control was converted about 4 months ago, so I'm not seeing those changes as a likely cause. This is irritating me as it's being very random about it, so I'm not exactly sure where to start looking. Any ideas?
Cliff Notes: LED converted dash/climate control. Worked fine for a year, now going schizo with respect to when they work and then they don't.
