Mrs.Romo92

Did you ever get this fixed?
I just bought a 98 Honda accord ex 4 cylinder 4 door. One night after hubby installed the after market stereo, something shorted and now no dash lights or tail/running lights. We tried all the fuses, in the driver side door and under the hood. We replaced ALL of the small fuses as well as the large black ones under the hood. This didn't fix our problem. So we replaced the head light relay switch and still nothing. Hubby checked the stereo connections and it all looks good. He taped off the dimmer/illumination wire (orange and white) so we know that isn't the problem.
I see many people mentioning that the multiplex control unit is the problem. However we can't afford to take this in to get it fixed.
At this point we've just been avoiding driving at night, and if we have to we take my old car until we get enough saved up for the repair. We are afraid to try to replace it ourselves and screw something up electrically.

poorman212

What about the pass side under dash fuse box, the #10 fuse in the PASS side under dash fuse box would be where I would start

Mrs.Romo92

Yes actually we replaced every single fuse in the car, Just in case. Even if they weren't blown 😖
But thank you for the suggestion!

poorman212

Ok, you just didn't say anything about the pass side under dash fuse box.....just drivers and under hood. There are three on this car.

Have a volt meter and willing to do some testing?

Mrs.Romo92

I'm sorry I didn't realize there was one on that side. 😖 I looked in my owners manual and it just says drivers side and under hood. I'll take a look and let you know! Thank you!

Gadget_Master

One thing is certain, the 2001 Cl owners manual and acura website are completely wrong when it comes to FUSE box descriptions. The fuse that controls, RUNNING/PARKING LIGHTS, POWER DOOR LOCKS, POWER TRUNK RELEASE, CLOCK, DASH LIGHTS, AND MORE.... is the fuse box on the passenger side of the glove box ... FUSE 13. its a 15A fuse. Thanks Honda

Mrs.Romo92

I did not know that! I looked today at this fuse box and didn't see anything related to my problem so I didn't try changing any of them. I will try changing that fuse.
But my question is, if that's the fuse that's causing the issues then why does my clock, power door locks and power trunk release still work?
Just wondering. This stuff is so confusing to me. It was honestly a ton easier to work on my Crown Vic. Even though it's a POS haha.

CollegemanKC

Ok i have a similar issue but not as extreme. I have a 04 Accord, installed an aftermarket radio, wired correctly. My taillights wont come on, my dash is fine, my headlights are fine, some interior lights are fine. The only interior light that is not functioning properly is the from dome, they DO NOT come on when the door is open, however they do come on manually. The rare dome light comes on when the door is open. My dimmer on dash board works fine. I checked the fuses inside the car and the fuses under the hood.

With all that said does anyone know the resolution ?

Silva Bullit DC4

I have that same problem in my 2000 V6. See thread here:

https://honda-tech.com/forums/honda-...issue-3289130/

Thinking now it probably is the MPU. Everything else I have tried, driver and passenger side fuses, even the lighting relays under the hood. And even if it is the MPU, I'm not sure which one it is, left side or right side.

Snoop.

gtarrgh

I had this same issue on a 94 civic hatch. It started gradually when I'd rotate the light switch the tail and dash lights would not always come on. If I wiggled it a little bit they would, until one day they wouldn't. The issue was where the wiring harness plugs into the light switch in the steering column. Unplugged it, plugged it back in securely and all started working again.

Gavon Duvall

Just replace the license plate fuse. It's on the passenger side fuse box. Problem solved!!! I also just put in a alpine deck.

Steisler

What did the Multiplex Unit repair cost you? Same thing happened to me tonight when i attempted to install a brighter LED bulb in my dome light housing. Blew a fuse, replaced it, but now my backlight of all bulbs that can be dimmed are out.

beajr64

i have a '95 Accord with a strange problem. turn on the turn signal 45mph or less and the speedometer bottoms down to 0 then goes back to your current speed.
Also, turn signals and gear box light 'pulse' when using the turn signal. Cold weather now, and it seems to not be happening when i first start driving. also, my car horn
only works when it's cold. I've asked several people and heard - shift sensor, battery ground wire, instrument control cluster, turn signal/headlight combo column switch
and car horn issue is the clock spring. i have a multi meter, voltage tester and continuity tester, just not sure where to start with this.

cjmguitarist87

Sounds like harmonic balancer or alternator. Its as if the alternator is not creating enough juice until its iver 45 mph. I had a bad harmonic balancer that would slip and cause similar issues


With the car running check the pulley, by observing, for abnormal wobble and movement.

Rafael Aviles

Its January in 2021. Bought a 1998 Honda Accord for my daughter. After market stereo caused lights to go out - came to this forum after changing multiplexor and trying the bypass method as well. Then I came across your solution the #10 passenger side fuse. THAT WAS THE CULPRIT. I am one of those fellas that won't stop till its fixed - i am packing it in at 1 am - but know my manners and wanted to thank you before I forgot about it tomorrow! "You shouldn't call that fella Poorman212 - you should call him "Lifesaver!" From the great state of Texas - THANK YOU POORMAN212!!!