[6T7GTAPONY]

Hi all,

I have a 1967 mustang and I installed a new radio from custom autosound, the installation went well, it worked both times i revisted the car in my garage.

Most recently I also replaced the speedometer cable.

Today I went to start the car up and let it run for a bit (it's winter here) and I noticed that my front left turn signal, and the left turn hood signal are flashing constantly and my radio will not turn on.

What could have gone wrong here? Is it possible the radio could be fried?

Thanks,

Frank.

 

[rex1965]

I don't think the radio is fried, you have either a electrical problem or a turn signal switch problem for the left flasher to blink constantly, when it gets cold plastic stuff gets really stiff so gremlins start to show up, check your turn signal switch and make sure it is centered and not turned to the left side. As far as the radio, where did you make your power connections, and did you turn the radio on (I know it sounds silly but these electronic radios can do weird stuff sometimes. If you have a DVM or voltmeter make sure you have power on your power leads to the radio, depending on your radio you will have several power connections, Bat + for memory, Ign or Acc for radio power on, and a Heavy Bat + if you power amp or if the radio has a lot of power output, and a ground connection for the chassis of the radio, if any are missing, then the radio will not come on. Maybe you bumped a wire loose when you did the speedometer cable. Good Luck.

 

[6T7GTAPONY]

I basically worked backwards when installing the radio seeing as how the custom autosound had a slight variation from the ken harrison radio that was in it previously, the main power, the memory power, and the ground all went into a small fusebox under the dash and it turned on and functioned properly for weeks.

That's what i'm thinking, I knocked something loose when I removed the cluster. I'm new to the "do-it-yourself" thing and basically looking for a place to start. Thanks for your reply.

I don't think the radio is fried, you have either a electrical problem or a turn signal switch problem for the left flasher to blink constantly, when it gets cold plastic stuff gets really stiff so gremlins start to show up, check your turn signal switch and make sure it is centered and not turned to the left side. As far as the radio, where did you make your power connections, and did you turn the radio on (I know it sounds silly but these electronic radios can do weird stuff sometimes. If you have a DVM or voltmeter make sure you have power on your power leads to the radio, depending on your radio you will have several power connections, Bat + for memory, Ign or Acc for radio power on, and a Heavy Bat + if you power amp or if the radio has a lot of power output, and a ground connection for the chassis of the radio, if any are missing, then the radio will not come on. Maybe you bumped a wire loose when you did the speedometer cable. Good Luck.

 

[Charles Reeves]

On a car this old I would suspect something related to the fuse box. I had to replace the one in my '66. The old one was pretty corroded.

 

[6T7GTAPONY]

Here's a little update:

Turn signals work properly now and I did not do anything to change that. Which is weird.

As far as the new radio goes, the fuses on the radio (1A on the red ignition wire, and the 15A on the back of the radio) are intact and not blown.

Fuse F1AL250V is blown, however the old radio turns on!

I'm so confused.

 

[rex1965]

A 1a glass fuse is very fragile, vehicle vibration can make it go bad (a fracture in the element can be in the end or in the middle all are hard to see with the eye) since the element is very thin, I would use a 2 or 3 amp fuse. If the fuse looks like it had a short somewhere and blown it then you have a short or an intermittent short or too small a fuse. If your radio is a digital radio, it should have memory power wire also, low current and hot all the time. Did you install the radio yourself? Also make sure you have your ground wire hooked up, also many of the newer radios, have isolated output stages feeding the speakers, which means the output wires run directly to the speakers and none are grounded, they have their own + and - for getting everything in phase. My 2 cts. Good Luck.

 

[6T7GTAPONY]

Yes I did install the radio myself. Everything was hooked up properly including ground and speakers. Like I said it worked for weeks.

I was able to bench test the radio and thankfully stills turns on.

Waiting on new fuses so I'm hoping that'll fix the problem.

A 1a glass fuse is very fragile, vehicle vibration can make it go bad (a fracture in the element can be in the end or in the middle all are hard to see with the eye) since the element is very thin, I would use a 2 or 3 amp fuse. If the fuse looks like it had a short somewhere and blown it then you have a short or an intermittent short or too small a fuse. If your radio is a digital radio, it should have memory power wire also, low current and hot all the time. Did you install the radio yourself? Also make sure you have your ground wire hooked up, also many of the newer radios, have isolated output stages feeding the speakers, which means the output wires run directly to the speakers and none are grounded, they have their own + and - for getting everything in phase. My 2 cts. Good Luck.