In looking at Service Bulletin 342 about radio interference it mentions inserting a "hood bond" between the bottom of the radio chassis and the top of the ashtray. I have never heard the term "hood bond". Could this be the rubber strip on the cowl that seals the back of the hood?
Thanks
Bill,
The hood bond is a metal V shaped spring type clip the best I can describe it. Some cars had them mounted on the top of the cowl and it contact the hood when closed and help insure the hood was grounded. What the service bulletin is suggesting is using this same clip between the radio and the ash tray to insure the radio chassis is grounded.. Static in the radio is usually caused buy the generator but you have an alternator or buy something in the engine high side voltage ( plug wires etc )
Jim - thanks. I think I may have just such a clip in my stash. The problem with my radio I get no radio sound at all - just static even when the engine is not running. When I test the radio off the car it works fine. I have installed dedicated ground wires for the radio and the antenna and even installed a 12 volt powered antenna - still only static. I have had this radio in and out of the car 5 times, and as you know I need to drop the under dash a/c unit (Mark IV) every time I work on the radio. I am just glad I allowed for enough flexibility in my a/c hoses so I do not have to remove the a/c hoses from the back of the under dash unit. Thanks. Bill
Have you applied an external 12v to the radio while it is in the car?
Lorne has a good suggestion. If it plays on the bench ok and not in the car is could be the speaker, can you run the speaker wires to an external speaker. I'm thinking a short in the speaker could be grounding the output...
I was thinking of an independent 12v source like a power supply or battery hooked directly to the radio wires, both 12v and ground, then individually to see if clean power and/or ground to the radio would make any difference.
Good suggestion. I will hook up an independent 12v source to the radio and see if this makes a difference. Thanks. Bill
Is there such a thing as "polarity" in the speaker wire hook up? If the speaker wire is hooked up backwards to the speaker could this be the problem? The speaker wire has the 3 prong hook up at the radio and two slide on terminals at the speaker. When checking the radio on the bench I have used another speaker. The speaker in the car is new and I can clearly hear the static so I always assumed the speaker in the car is OK.
On a completely different topic: if you are looking for a terrific movie go see Nebraska starring Bruce Dern. Some car interest but really a great father and son story.
There is a polarity on a speaker but with the original radio that is mono it shouldn't make a difference as long as it's the correct two wires. I'm not using my original radio and speaker so I'm not sure what the three wires on the radio side are? Where does the third wire go after coming from the radio if there are only two at the speaker?
I think the third prong on the radio side of the speaker wire is a positioning prong only.
Both a positioning prong and also a retention prong. If I remember correctly the third prong has a "barb" on it for retention.
OK that makes sense. Sorry for all the questions, but have you taken it out and bench tested it since the first time you tried it? The reason I ask is it could have worked fine at the shop but these old radios can blow capacitors at any time, like the first time you turn it on and it gets 12V.
My other thought still goes back to the speaker, even being new it could be defective.
A handy 12 v power source...even has a on/off switch, and a polarity switch
Jim - I have actually bench tested the radio 3 times with the most recent test being 1 week ago. I will borrow a speaker from my neighbor and give it a try (a speaker that I know is good). Rich - good power source. I have an extra 12v car battery and some long jumper leads so that I can sit the battery on the ground (with the battery grounded to the frame) next to the open door. Thanks.
I will let you know the results.
Good luck Bill, I know how frustrating it can get with something as easy as hooking up a radio goes wrong, it always seems the little things get you :005:
This is really taking a stab in the dark but is there anyway you could have mixed up the light and power wire? Maybe the radio will play if you turn the dash lights on bright. Just kidding :003:
I would try grounding the battery to the radio first, just in case the body ground (or radio to body ground or radio ground wire )is not any good for whatever reason. Then you will have checked both the gound and the 12v supply to the radio, sometimes the conditions can change away from the bench. Does kinda sound like the speaker though.
I had a bad distcap/rotor a few years ago and my xm-radio wouldn't pick up stations work when the engine was running, except with the hood open.
I changed everything even the radio, and the MSD box/coil. Ended up the carbon buttom in the center of the distributer cap had worn away and it was creating a field which interefered with the radio, especially with the hood closed.
Took forever to figure out. I called the MSD tech guy and let him know when I finally figured it out.
I am still running the stock points and condenser. The radio powers up, the light comes on whenever the radio is on but all I get is static when I tune through the stations. I am going to try a different speaker and see what happens.
Quote from: hiball3985 on 2014-01-05 18:26
Bill,
The hood bond is a metal V shaped spring type clip the best I can describe it. Some cars had them mounted on the top of the cowl and it contact the hood when closed and help insure the hood was grounded. What the service bulletin is suggesting is using this same clip between the radio and the ash tray to insure the radio chassis is grounded.. Static in the radio is usually caused buy the generator but you have an alternator or buy something in the engine high side voltage ( plug wires etc )
Jim I had one of those V shaped things on one of my cars. I took it off then threw it away because I couldn't figure out what it was for.
Quote from: Ecode70D on 2014-01-06 10:10
Jim I had one of those V shaped things on one of my cars. I took it off then threw it away because I couldn't figure out what it was for.
I can't believe you of all people threw something away :003: I know I've kicked myself more then a few times for throwing things away. I threw away 2 57 antenna's that hung in the garage for 30 years about a month before I bought my Ranchero and now I need one :005:
Have you tried replacing the condenser?
Tim :unitedstates:
The problem is I have no radio sound at all - just static. Normally if you have interference from the ignition system you have radio sound also plus static. I am going to try a new speaker in the next few days and see what happens. Thanks.
Quote from: Ecode70D on 2014-01-06 10:10
Jim I had one of those V shaped things on one of my cars. I took it off then threw it away because I couldn't figure out what it was for.
The "V" shaped thing....
Bill - interesting. Never seen before. Probably most of them got tossed. Thanks
Thanks for the pic, geez I've got one somewhere as well- it looked like it broke off sometning and I could never figure where it was from!
I never would have guessed what that was for..now I'll have to search my bags of old rusty things.
Quote from: BWhitmore on 2014-01-06 17:23
Bill - interesting. Never seen before. Probably most of them got tossed. Thanks
They scratch the under side of the hood, which I would guess is why most are discarded. Only one of the 57s that came here had a broken lower half remaining, Ranchero was missing altogether. They are made of a brass alloy of some kind, the two tangs on the top contact the hood in an attempt to isolate static from the ignition system.
Quote from: Ford Blue blood on 2014-01-06 17:11
The "V" shaped thing....
That's the one. Thanks for posting the picture
Quote from: RICH MUISE on 2014-01-06 23:45
I never would have guessed what that was for..now I'll have to search my bags of old rusty things.
It looks like I'm going to have to search my rusty things too. It will make a nice conversation piece even though I don't have a radio.
Interesting,I wonder why the Hood Hinges,Hood catch and release would not serve the same purpose of becoming a ground?
Quote from: Jeff Norwell on 2014-01-08 11:12
Interesting,I wonder why the Hood Hinges,Hood catch and release would not serve the same purpose of becoming a ground?
I've thought the same thing. Maybe is was just another one of those service department sales gimmicks "because you will buy anything" :003:
Maybe Jim, the Brass alloy was thought to be a good conductor.Ford would never pull that sales Gimmick thing,would they?
Quote from: Jeff Norwell on 2014-01-08 11:46
Maybe Jim, the Brass alloy was thought to be a good conductor.Ford would never pull that sales Gimmick thing,would they?
I can't honestly comment on Ford, I've never had any dealings with a car dealer. But my wife worked in the parts/service dept of a GMC/Buick dealership for 20 years and I know what went on there :003:
The "V" thingy was on the 62 Bird I built and on a 62 Bird rag top I sold and on my 66 Falcon Ranchero. They just faced front to back instead of side ways like the 57. Don't know when Ford stopped putting them on, the 65 Bird I'm currently working did not have one but it was taken apart when I picked it up. Never thought to look for the tell tale scratches before I painted it.....
Quote from: Jeff Norwell on 2014-01-08 11:46
Maybe Jim, the Brass alloy was thought to be a good conductor.Ford would never pull that sales Gimmick thing,would they?
I haven't found mine in my collection of rusty junk yet.
Quote from: Ford Blue blood on 2014-01-08 22:50
The "V" thingy was on the 62 Bird I built and on a 62 Bird rag top I sold and on my 66 Falcon Ranchero. They just faced front to back instead of side ways like the 57. Don't know when Ford stopped putting them on, the 65 Bird I'm currently working did not have one but it was taken apart when I picked it up. Never thought to look for the tell tale scratches before I painted it.....
Somewhere in my foggy memory I think my 66 F250 had one originally.