900 SE Convertible V6-2498cc 2.5L DOHC (1995)
Free play/poor contact between the various sections of the antenna mast may occur. Check this as described below:
1.
Switch on the radio and let the antenna extend to its fullest height.
2.
Take a resistance reading across the top of the antenna mast and the center pin of the antenna/aerial connector.
3.
If the reading obtained is more than 30 ohms the antenna/aerial mast should be changed.
4.
Connect the antenna cable.
5.
Tighten the nut at the base of the antenna mast (unless this has already been done) and then the two nuts securing the antenna/aerial.
Note
It is important that the two nuts that secure the antenna/aerial bracket are loose before trying to tighten the nut at the base of the antenna/aerial mast.
This assures that the grounding plate is free to make contact with the body panel.
6.
Refit the luggage compartment trim.
7.
If the antenna mast is dirty it can be wiped clean with a cloth (do not lubricate it with wax, silicone, or oil).
8.
Continue as described in point C.
C. Interference
Interference may be caused by different systems in different cars. To determine which system or systems are the cause of the interference, the tests must
be conducted outdoors so that they will not be affected by electrical equipment. etc. in the garage.
Interference may be of three kinds:
^
Background noise, see point C1.
^
Background tones, see point C2.
^
Ignition system interference, see point C3.
C1. Background Noise
On M94 cars and up to and including M96 cars, the ICE may be the cause of background noise. Starting with M97 cars an interference suppressor has
been introduced in the ICE.
To check
Turn the ignition switch to the OFF position and activate the radio. Tune in a weak station. Remove fuse 35. This should result in a noticeable reduction
of the noise.
Procedure
