Interior lights and door locks 95 mustang GT convertible

Hort

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What a mess! No interior lights and when pushing the unlock switch the bell rings and the fog lights flash! Has anyone experienced this and found a solution?
 
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revhead347

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Does it have a remote or a aftermarket alarm?

Dead on. Moreover, did it ever have an aftermarket alarm? Those are usually clipped in (poorly by guys at Circuit City) to the wiring harness that comes down from the ignition switch under the the steering column. Look for evidence of ****y.

Kurt
 

Hort

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Sorry, got a chuckle out of this. Def got some wiring / ground issues going on.
Not only having electric issues but took this long to figure out how to respond on this site!
I would probably be laughing to, so I understand, I was just reaching out to see if this kind of stuff is common for fords and see what ideas would be suggested. I will check for ground issues as suggested, thanks for your help.
 

Hort

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Dead on. Moreover, did it ever have an aftermarket alarm? Those are usually clipped in (poorly by guys at Circuit City) to the wiring harness that comes down from the ignition switch under the the steering column. Look for evidence of ****y.

Kurt
Sorry for the delay can you tell me if mustang was standard with an alarm for 1995 GT’S
another thing I’m questioning is all these clamp in in-line single splices, is that something that ford did to cut costs and time?
 

revhead347

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Sorry for the delay can you tell me if mustang was standard with an alarm for 1995 GT’S
another thing I’m questioning is all these clamp in in-line single splices, is that something that ford did to cut costs and time?

No, if there are in line butt splices, it's from when someone put an aftermarket alarm in, it failed, and then took it back out and just spliced everything back together. The good news is, it's probably an easy fix. Ford has really good color coding on their wires. Make sure all the colors match on each end, take out butt splice, solder back together. There's a good chance that will fix it.

Kurt
 

Hort

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Thanks for your information I will dig into this mess as soon as I get the car back from the alignment shop, they said something about needing to drill out new holes to move the struts so they could adjust the caster. I think I may have bought a unending can of worms
 

revhead347

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Thanks for your information I will dig into this mess as soon as I get the car back from the alignment shop, they said something about needing to drill out new holes to move the struts so they could adjust the caster. I think I may have bought a unending can of worms

It's an old car man. There's going to be problems. You should the crap we have to deal with on the E30 BMWs we work on.

Yes, you can drill out the struts to adjust the caster, but it's time poorly spent. For what a set of caster/camber plates go for, it's well worth it. It will be easier to adjust, give you a much larger range of adjustment, and look much better.

Kurt
 
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revhead347

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It's an old car man. There's going to be problems. You should the crap we have to deal with on the E30 BMWs we work on.

Yes, you can drill out the struts to adjust the caster, but it's time poorly spent. For what a set of caster/camber plates go for, it's well worth it. It will be easier to adjust, give you a much larger range of adjustment, and look much better. Plus the new caster/camber plates are going replace the current strut mounts which are most like likely worn slap ass out causing the problem in the first place....for about the same price of a new set of strut mounts.

Kurt
 

Hort

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Thanks for the heads up, unfortunately the alignment shop had it done before I read this so I’m going to buy a set from CJ Pony parts for future use.
 

Hort

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No, if there are in line butt splices, it's from when someone put an aftermarket alarm in, it failed, and then took it back out and just spliced everything back together. The good news is, it's probably an easy fix. Ford has really good color coding on their wires. Make sure all the colors match on each end, take out butt splice, solder back together. There's a good chance that will fix it.

Kurt
You already knew you were right but I wanted to let you know that you were spot on with the aftermarket alarm! These guys should be ashamed of themselves on the pathetic way they installed the piece of junk! Now I have to get this cleaned up and back to norma. Thankful for your help with the diagnosis and a good hot tub!
 

revhead347

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Thanks for the heads up, unfortunately the alignment shop had it done before I read this so I’m going to buy a set from CJ Pony parts for future use.

Well, won't hurt anything really. If they already did it then don't worry about it. I wouldn't buy a set of caster/camber plates until you need them. One of the tricks when I did alignments (this is in the long long ago, in the time before time) was to pull the strut mount down and rotate it to see if that helped before we actually drilled it out.

Kurt
 

Hort

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It's an old car man. There's going to be problems. You should the crap we have to deal with on the E30 BMWs we work on.

Yes, you can drill out the struts to adjust the caster, but it's time poorly spent. For what a set of caster/camber plates go for, it's well worth it. It will be easier to adjust, give you a much larger range of adjustment, and look much better.

Kurt
Here we are 10 months later and scratching my head again! How can something this beautiful act like it is possessed? I have a short in the radio circuit so I pulled the fuse on number 8 to buy some time to get to work on the issue. The car has been sitting in the garage about a week, since I pulled the fuse and I walked out and found the right turn signals flashing tonight! Needless to say I disconnected the battery. Have you ever experienced this? Do you have any suggestions? Your help in January was spot on and very helpful so I thought I would give you a shout if nothing else thought you would get a laugh out of my agony!
 
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revhead347

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Here we are 10 months later and scratching my head again! How can something this beautiful act like it is possessed? I have a short in the radio circuit so I pulled the fuse on number 8 to buy some time to get to work on the issue. The car has been sitting in the garage about a week, since I pulled the fuse and I walked out and found the right turn signals flashing tonight! Needless to say I disconnected the battery. Have you ever experienced this? Do you have any suggestions? Your help in January was spot on and very helpful so I thought I would give you a shout if nothing else thought you would get a laugh out of my agony!

Nope, never seen that. Probably just a bad turn signal or emergency flasher switch, or something else stupid like that.

Kurt
 
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greg94

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Hort
I had the exact issue in my 94. This will sound weird as it turned out to be the speedo and printed circuit board on the back of the instrument panel. If you want to test this....unplug the 2 harnesses to the instrument panel. You only need to partially disassemble. Rotate so you can access harness and unplug both. Make sure fuses are good. Then hit the door and interior light. If they work you are closer to finding the short to ground. . Pull the instrument cluster and inspect the printed circuit board for burnout. The number 8 and 12 fuse location in the mustang can create some wired issues.
 

Hort

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Hort
I had the exact issue in my 94. This will sound weird as it turned out to be the speedo and printed circuit board on the back of the instrument panel. If you want to test this....unplug the 2 harnesses to the instrument panel. You only need to partially disassemble. Rotate so you can access harness and unplug both. Make sure fuses are good. Then hit the door and interior light. If they work you are closer to finding the short to ground. . Pull the instrument cluster and inspect the printed circuit board for burnout. The number 8 and 12 fuse location in the mustang can create some wired issues.
Thanks for the information I will keep it as the next step. HOWEVER I got thinking about how the R front turn light was the only one blinking with everything off. I realized that the emergency flasher is the only way to power the blinker relay, so this morning I activated the emergency lights and then turned them off. Now (this might come back to bite me) but everything went back to normal! Currently I have driven the car around for a few hours and now it is parked back in the garage. I’m checking hourly and so far all is well. It’s going to be a long night!
THANKS AGAIN it’s nice to know that people will share all this weird stuff.
 

revhead347

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Thanks for the information I will keep it as the next step. HOWEVER I got thinking about how the R front turn light was the only one blinking with everything off. I realized that the emergency flasher is the only way to power the blinker relay, so this morning I activated the emergency lights and then turned them off. Now (this might come back to bite me) but everything went back to normal! Currently I have driven the car around for a few hours and now it is parked back in the garage. I’m checking hourly and so far all is well. It’s going to be a long night!
THANKS AGAIN it’s nice to know that people will share all this weird stuff.

Change that flasher out of principle.

Kurt