Power Antenna problem

I've read a few of the threads about antenna's so perhaps one of you could
point me in the right direction. I've spent over 2 days trying to make this thing
work right using the switch in the Mondial. The way this antenna works is the
following.

red wire - power to the antenna.

black wire - ground

green wire - trigger wire?

When I short red and green together and put the black to ground the antenna
goes up. If I remove the green wire the antenna goes down.
The antenna switch in the car has no power on it, it looks like it is just
a switch. If I hook the green wire to it and apply 12 volts the antenna
will go up and then goes down.

Can anyone tell me if the car switch is suppose to have power on it?
or can anyone tell me the easiest way to run a wire from the battery
compartment to the trunk?

BTW the radio has 2 wires for a remote antenna but I dont read anything
on those wires either.

Thanks in advance for the help.

bruce

 

bquan94545.

Sounds like you have an after-market antenna. I think the stock Mondial should have only two wires going from the switch to the antenna motor. Typically, green striped brown from the switch to the antenna motor.

The Mondial antenna switch should have five terminals. I think it is basically two single pole double throw switches in one box, with one throw on each switch making contact at rest. two terminals go to ground, one 12v terminal powers both switches internally, and two are the switched leads to the antenna motor. The ground wires on the switch should be black. The power wire brown. The switched wires green with brown stripe. Sorry, that is hard to visualize.

Unless someone has pulled your antenna power wires out, they should be located between the right taillight and the quarter panel, behind the interior trunk lining.

Do you think your switch wires are still under the console? Should be two blacks, two green/brown and one brown.

Do you have a factory wiring diagram?

Do you have an ohm meter?

I think you are probably right on the red-green-black determination for your antenna, but you might make sure with an ohm meter. At least make sure that the black wire has zero resistance to ground on the ohm meter.

Did you try to ground the black wire and then put a 12v power source to the green wire and then the red wire, separately?

Your antenna may be what is called an automatic antenna versus a semi-automatic. I don't have a wiring diagram for a comparable antenna.

I have combined two issues here and probably didn't answer your question.

Sorry this is so long and I hope some of this may help. Good luck. DRG

 

It may or may not be able to be controlled with an on-off-on toggle switch.

It would help if you could post the brand name of the power antenna or describe the color of the wires coming off of the power antenna.

Most after-market replacement power antennas seem to have three wires, which are red, green and black. The red wire is hooked to a constant 12v source, the green wire is hooked to a conditional 12v source, usually a power source from the radio that is controlled with the radio on/off switch and the remaining black wire is connected to ground.

The green wire provides power to raise the antenna. When the power from the green wire is removed(i.e. radio turned off), the power from the red wire retracts the antenna. The green wire power source could be controlled by an on/off toggle switch, if you so desired.

found and pinched from Hoptup32 on the Hotrodders chat page. No approval - no offense intended.

Thanks,
DRG

 

Document 488-87 is the 1987 3.2 Mondial wiring diagrams. Fig 9 contains the radio and antenna schematic showing hookup of the 5 wire switch. http://www.ferraridatabase.com/The_Downloads/Downloads.htm

With an aftermarket antenna it's unlikely you end up using the original switch. Therefore, I completely agree with Jerry above, with emphasis on the following oft ignored situation I've seen many times.

Since the radio works off the ignition switch many people supply the same ignition sw voltage to the red antenna power lead. If you do, you will find the antenna often doesn't go down when you exit the car...because you have removed it's ability to do so when you switch the key off.

Therefore, antenna power to fused battery please.

 

I am not sure which Mondial model you are working on. I think the color coded wires are different on Mondial 8 & QV than the Mondial T, but I think the switch is otherwise wired and functions the same.

If you permanently, or maybe even temporarily, "hot wire" the antenna motor power source straight from the battery, or other 12v supply, use an in-line fuse very close to the power source to protect the circuit from an unintentional electrical short.

A good substitute power source in the Mondial is the parking light or wiper motor steering column connector located just above the bottom of the dash to the right of the steering column. That circuit is not used very much and you don't have to locate a power wire through the firewall. The antenna power requirement is generally very temporary, so it would not necessarily require a dedicated permanent power supply. Just don't use the parking lights or wipers at the time you use your antenna and it shouldn't be a problem using that circuit. Locate the power wire with a test light or volt meter and use a piggy back splice/connector or other means to tie into it. Do not cut the wire. I have used a male-end splice connector terminal and pushed it into the connector next to the power wire for a temporary power supply. If you decide to use it for a more permanent power supply be sure to tape the wires together so it doesn't come loose and cause a new intermittent problem or a loose connection overload.

It gets a bit more complicated as Paul suggested as to whether you need a "key off" power source or a "key on" power source. Because there is no "accessory" key position that option is not available.

I have found the best place to run a wire through the firewall is on the right side using the factory hole for the A/C line. It is close to or behind the mileage counter service module. The wire can be concealed under the dash, behind the right kick plate, or across the interior side of the firewall and directly into the center console.

If you work under the dash you will also need to include one trip to the chiropractor to fix your back.

DRG

 

DRG thanks for taking the time to give me valuable info.
Today I pulled the antenna switch and compared the wires in
the plug to the one that is in my wiring book and some of the
wires are reversed. I suspect someone has been messing with
the wirinig which would explain why I dont have 12w volts to
some wires that should.

Paul_308 it is and isn't the original switch.
The original relay switch broke . I had another oem antenna that
had a good relay system and a bad aerial. So I mashed the two
together and has one that works, I think.

 

Thanks for the help and explanation on how it works.
I went into the console and took the black wires off the
socket. I taped it up and dropped it to the bottom of the console.
moved the brown wires to the middle position. I fixed the wring
the way it should have worked and I made 2 separate circuits.
That in it self was a big piece of the problem. I then hooked up
a relay and wired it so when it actuates the contacts close
and I got the green trigger wire and the red permanent wire
connected to each other , antenna goes up. When the relay
isn't actuated the NC side of the contacts cuts in and the
red and ground are seen by the motor and it goes down.

bruce

 

Bruce. Congratulations! It is always a good feeling to get thing like that sorted out. You get the "atta boy" award of the day. Some people have to pay someone else to do that kind of stuff, and that is why it doesn't get done. It is the cause of deferred maintenance. I hope you have many more successes personally working on your Ferrari.

DRG

 

Cool thread, thanks.