Hi, everyone. I've scoured the web trying to figure this out. My 2001 LX V6 coupe with the headlights on has backlights on the A/C controls, the shift selector, the radio, and the dimmer works, but all of the gauges (speedo, tach, fuel gauge, temp) are dark. The gear selector lights remain lit. Every fuse is good, every bulb is good. I'm stumped. It doesn't seem like a multiplexer issue, but how do I test / what do I look for next? What other info can I give?

This thread:https://www.hondaaccordforum.com/forum/showthread.php?t=15141&styleid=4
...helped me diagnose a bad multiplexer in my 1999 EX, but it's not helpful here so far as I can tell. Argh. :-\ Thanks in advance.

-Zak-

 

Can you repost a live link, so I can tell which test you already done?

 

Probably the driver's side multiplex control unit.

You can enter the car's VIN in this link; otherwise, you can contact American Honda to see if they will cover you even if it is not within the recall VIN range.
Honda Automobile Recall Information

Honda TSB 04-034

 

Or you have a burnt out bulb

 

Not sure if this will help....with the lights on, are you getting voltage to B22 on the cluster?

 

Ahhhh, good idea to check. What does B22 look like in the real (non-schematic) world....? Is it one of the pins on one of the three green harnesses at the top of the gauge cluster?

 

Thanks for the TSB link, I'll contact the dealer that the car has been serviced at since new for help.

 

So, no joy on the TSB, I'm outside the VIN range, apparently. Yes, I have 12v switched on B22, just checked it. :-\ What's weird is that my gear selection indicator lights on the gauge cluster work, as does the dimmer ****, and I've got backlights on my HVAC controls and the gear select lever. What else can I look at, or is that multiplexer for sure?

 

99 Accord LX - No dash lights when headlights on - Honda Accord Forum - Honda Accord Enthusiast Forums Here's the live link you asked for earlier, sorry about that. :-)

 

Solved it. I took the cluster out, dismounted the plastic cover on the back, and the B22 pin was all charred. Took off the circuit board and that trace was burned clear through. Drop of solder, buttoned it back up, works like a charm. :-) Win!

Thanks for looking, all. That tip about B22 was key.