Speedometer, Dome light, and Radio Not Working NEED HELP!!!

Silver95Stint · Dec 13, 2004

I was driving back from Scotland this afternoon and the radio just quit working and my clock was completely off. I looked up at my mph's gauge and it was just dangling down by the Odometer. Any clues as to what would cause this? Any help would be greatly appreciated. Thanks in advance.

BlueOvalStangGT · Dec 13, 2004

MY speedo and all that turned off when the guy at razors edge forgot to ground the computer again, might want to check that.Im guessing its a ground but im not gonna try to to tell you how to fix it cause thats whats wrong with my car and I cant fix it.

mootang · Dec 14, 2004

have you checked all the fuses under the hood and by your pedel assembly. if not i'd start with that

SN95StangMan · Dec 14, 2004

Check the #8 fuse under the dash on the drivers side. It sounds like that is the culprit.

Silver95Stint · Dec 16, 2004

Thanks all that replied, I will go through and check to see if the number eight is indeed the culprit.

Klawin · Sep 18, 2007

Need FAST help!!!!

I know it has been awhile since someone has posted in this Thread, but I am having the exact same issue. I have a 1995 Mustang Coupe, V6, 5 Speed.

I was driving down the road, and had the exact same issue happen to me. I checked the fuse box on the side of the road. Yes, that #8 fuse was blown. Replaced the fuse and it keeps blowing.

Once I got home, I noticed a few other problems:

1. Everything to that fuse doesn't work, of course.
2. My door locks do not work.
3. Parking, and instrument panel, lights flash when I turn the key off.
4. If I hold down the door lock button, when turning off the car, the parking lights will stay on until I let off of the door lock button.

I am lost. I am sure there has to be a short somewhere, but I have no idea where to even start. I don't have the money to keep replacing parts, or fuses.

Anyone have any ideas what so ever?????

Any help would be appreciated.

Nickisa0 · May 29, 2009

I'm having the exact same issues as the person who posted above me. Here's my thread: http://forums.stangnet.com/786766-electrical-gremlins-got-me-tonight-help.html

I checked my #8 fuse and it was fine. Anyone else have any input?

Vin · Feb 9, 2015

I know this is old feed but I have same problem any clues?..

promustang50 · Aug 11, 2015

Vin and all others inquiring about this,

Yesterday I was driving my 1994 Ford Mustang GT convertible and all at once my radio, speedometer, door locks, interior mirror lights, convertible switch and mirror adjustment switch stopped working. At that same time my wife and I noticed a burning smell that smell like a wire or a module had just fried. When I got home I started the diagnostic and first noticed that the #8 fuse was blown. I replaced it and immediately noticed it blew again. I took out everything except for the main dashboard and the seats that way I have full access to all wires. I called it a night due to insufficient lighting and picked up the next morning. After checking all wires, grounds and all switches and modules in the interior portion of the vehicle hi then considered checking the trunk. I tore out the perimeter interior of the trunk and immediately noticed the same smell I smelt the previous evening. I zeroed in on the Ford keyless entry module and noticed that it had been the object that fried last night. I went to the junkyard and got a module today and replaced it and replace the fuse. Needless to say everything worked again and i test drove it for 20 miles and no issues have popped back up. For those of you still looking and trying to figure out this 14 year old mystery, as thats what ive gathered from all other blogs with no answers, check your Ford Keyless Entry Control Module located in the driverside portion of the trunk!

revhead347 · Aug 15, 2015

That fuse also ties into the underhood light. Had the same problem before and found the wire to the underhood light had fallen down, and was grounding on the master cylinder.

Kurt

TERRY LANG · Aug 21, 2016

I own a 1998 Mustang GT and the speedometer quit working. I was getting ready to pull out the gauge cluster to take it completely apart to see if the speedometer gears were broke. I noticed my power mirrors were not working so I replaced the fuse. The next time that I drove the car the speedometer was working. No body on the forums mentioned that the speedometer not working might be a fuse problem. After replacing the power mirror fuse the speedometer starting working again. The speedometer and the power mirrors use the same fuse and that blown fuse was the problem with both.

Batstang98 · Feb 3, 2017

Was wiring in a aftermarket radio the other day and when it failed to power on i drove it to have it checked by a friend and notice the speedometer windows dome lights door locks all stopped working. checked all fuses found a blown 15 and replaced the fuse with no change any help?

jrichker · Feb 11, 2017

You failed to tell us what year car this is. Without that information, we cannot provide a suitable answer for your car.

The following is for 87-93 Mustangs. Do not attempt to use it on other model years.
The door locks and power windows use a circuit breaker. One circuit breaker is a small metal rectangle box on the fuse block inside the car. The other circuit breaker for the door locks is a small metal rectangle box on the starter solenoid.

The dome light and dash lights are controlled by the dimmer switch which may have an internal fuse.

Mustang 5.0 Lights and Radio schematic, by TMoss:

Fuse box layout

apothicca · Feb 21, 2017

holy necro

Demetrius · Aug 25, 2017

promustang50 said:
Vin and all others inquiring about this,

Yesterday I was driving my 1994 Ford Mustang GT convertible and all at once my radio, speedometer, door locks, interior mirror lights, convertible switch and mirror adjustment switch stopped working. At that same time my wife and I noticed a burning smell that smell like a wire or a module had just fried. When I got home I started the diagnostic and first noticed that the #8 fuse was blown. I replaced it and immediately noticed it blew again. I took out everything except for the main dashboard and the seats that way I have full access to all wires. I called it a night due to insufficient lighting and picked up the next morning. After checking all wires, grounds and all switches and modules in the interior portion of the vehicle hi then considered checking the trunk. I tore out the perimeter interior of the trunk and immediately noticed the same smell I smelt the previous evening. I zeroed in on the Ford keyless entry module and noticed that it had been the object that fried last night. I went to the junkyard and got a module today and replaced it and replace the fuse. Needless to say everything worked again and i test drove it for 20 miles and no issues have popped back up. For those of you still looking and trying to figure out this 14 year old mystery, as thats what ive gathered from all other blogs with no answers, check your Ford Keyless Entry Control Module located in the driverside portion of the trunk!

Hey how can I get in touch with you?

General karthief · Aug 25, 2017

Demetrius said:
Hey how can I get in touch with you?

That member has not posted in 2 years

greg94 · Aug 25, 2017

My car has the same issue. I removed the keyless entry but that did not help. Going to backtrack and check all the grounds and keep finger cross. The #8 fuse will blow. I really wish I was better at tracing electrical.

MikeW70 · Jul 24, 2019

Demetrius said:
Hey how can I get in touch with you?

Thank you for the tip on the Keyless Entry Module!! I had the same issue with my 95 GT. Fuse 8 kept blowing. No Radio, no speedometer, no dome light, no power locks etc. The car had an aftermarket stereo when I bought it so knowing that it was on the Fuse 8 circuit I started there. No luck. Removed the stereo and the aftermarket CD player that was below it. Next I moved onto searching for a bare wire. Another discussion mentioned that the printed board on the back of the gauge cluster could be the problem. Removed the gauge cluster, fuse 8 still blowing. Read your thread about the Keyless Entry Module. Found it on the driver's side in the trunk behind the carpeting. Removed the 2 large push retainers and the small one on the rear wall and got it free enough to pull the 3 plugs out. There I saw the infamous light green with yellow stripe wire that seems to run everywhere from fuse 8. Anyway, pulled all 3 connectors and put in a new 10A fuse in #8. It did not blow!! Now I have to begin the reassembly of everything, but that is OK. At least I know what it was and can get it corrected. Hate electrical gremlins!! Thank you again for sharing what you found.

Scott94gtvert · Aug 3, 2025

So my 94 Gt convertible did the exact same thing. No speedometer, dome, radio, clock and the doors would only lock. Keyfob no longer worked either. Fuse #8 blown and kept blowing. I checked the Keyless entry module as Promustang50 and MikeW70 did and you could smell the smoke. Its unhooked now and everything is working again except my dome and door locks. My concern is did it just go out due to age or did something cause it to burn out. There are no new keyless entry modules available for it. Can anyone give me the wiring diagram for it and what exactly runs through it? I'm going to try replacing it with a used one but was considering installing an aftermarket with car alarm in its location because all the wires I need are there. Just need that wiring diagram. Appreciate and help

AeroCoupe · Aug 3, 2025

Found these over on www.allfordmustangs.com so maybe they will help?

Speedometer, Dome light, and Radio Not Working NEED HELP!!!

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Apparently my ex-husband made that mistake.

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