It's a long time now since I owned my 306 but your problems sound
familiar.

1) Sounds like the speedo sensor which I believe is located on the
gearbox housing has failed. Mine used to fail intermittently but when
I heard where the sensor was (on the gearbox facing the bulkhead) I
decided to ignore it.

2) I know that my car's fan didn't work in the highest position when
I was looking to buy my 306. The dealer replaced the switch for me
and that fixed it. Might be worth you by-passing the switch to see if
that's the problem.

3) Whilst you've been "doing something" you've probably triggered the
alarm. The siren units often fail (because they are located above the
nearside front wheel arch liner and so water quickly gets in). I
can't quite remember how you reset the alarm - I think it involves
pressing that little button on the righthand side of the steering
column within about 15 seconds of opening the car and turning on the
ignition. (Worth searching the messages here because I think it's
been mentioned in the last year).

That's all I can remember. Let us know how you get on,
Stuart
http://www.stuartdalby.co.uk/peugeot306

--- In stuartspeugeot306club@..., "leeandalan"
<leeandalan@...> wrote:
>
> Hi
>
> I hav recently purchased a 98 2.0xsi. Fantastic mechanically and
> driving however one (or maybe more) problem:
>
> They are all electric based and are as follow:
> 1)Speedo and therefore mileage does not work (lighst are on but no
> movement on either)
> 2) The internal fan is dead no matter where I position the
controls,
> the same is true for the stereo and air con)
> 3) While checking the fuses I seem to have done "something" to the
> alarm. Evrey time I enter or leave the vehicle or indeed turn it on
> the healights flash.
>
> All fuses appear to be intact but did notice there is no relay at
the
> bottom of the internal fuse board (closest to the fuses) where
there
> is a gap to plug it in.
>
> Any help (mainly the headlight flashing and fan controls
appreciated.
> It may be the radio is related to the problem but if not I can run
a
> new feed easily enough.
>
> Thanks
>