S70 1999: Antenna mast and motor assembly

In the last couple of week the motorized antenna mast of my 1999 S70 started
to behave erratically, it will some times fully extend,
some times only partially, some times it will filly go down, and some times
only partially. Now it seem to be stuck half way in, and will not
move.

I did dismantle the whole thing down to the motor casing, cleaning up all
the grim (and a lot of it) that had accumulated on the gear train, I check
that there is
no broken or missing teeth on the motor, gear train or the plastic cord (???
whatever the name is) that push/pull the antenna, everything seems to be OK.

When the motor is NOT connected to any gear, when I turn the radio ON, it
will turn in one direction for a couple of second and then if I
turn the radio OFF, it will turn in the other direction for a coupe of
second. But if the motor is connected to the gear-train and antenna
assembly, the motor will only turn a fraction of a turn and stop ..... is it
toasted ?

 

if the plastic tail is disconnected, and you opush/pull on it, does the
antenna go up/down freely?

if not, i think the problem is there and the motor meets resistance so
it thinks the antenna is at the top.

 

The mast itself is OK, it goes up and down easily while pushing/pulling the
plasting tail. I suspect that either the motor
has not enough torque anymore or that the electronic that sence that the
motor meets to much resistance (probably
some sort of current sensing circuitry) is dying.

I still wonder if I should invest more time trying to figure it out, or if I
should spit the $$$ to change the whole thing, probably
a ~$200 ~ $300 cdn ordeal.


Thanks for the reply

 

I had pretty much the same issue with my 1999 S70. I replaced the
entire unit with one from FCP Groton for about $140 CDN. Don't go to
the dealer. They wanted $300 plus tax for a job that took me about 20
mins...


Jabber

 

Hi
I have a 940 Volvo with standard headlights

Will the headlights from a 1979 with the foglights fit?

Would the fog light hook-ups be installed in the wiring harness?

Thanks

John