850 1995 Wagon Topic is solved

[manovlov]

Hy Guys,

i hope everyone is fine. Since a long time i didn't visit MVS...

I have a question. Recently, i've lost one rear brake bulb (i mean the bulb stopped to work). On the same time, i've also lost the four dashboard counters bulbs (speedometers, rmp counter, petrol gauje...).

I've tested all the fuse with my metrix, they are all good. I've replaced the bad bulb too.

Does this issu inspire someone ? Could it be possible to lose all these bulb with the rer bulb short cut ?

The thing i didn't do for the moment is to open the dashboard cover and to extract the main "bloc" to test all thes four bulbs.

Should i look around somewhere else before doing this ?

As always, thanks to those who will give me their mind about this issu.

Manov.

Combiné instruments.png (401.13 KiB) Viewed 342 times

[Vova585]

I doubt that issue is related, unless your alternator "spikes". I would start with testing voltage on idle, then on 3500rpm, then on idle with "demand"(high beams, fan full speeed), heated seats, defroster). If your voltage is in speck, I would move to testing dashboard.(your rear bulb is operational since replacement, so no need to go there). I would take a low amp light tester(or small turn signal bulb) and check of you have supply to the bulbs. If not, check what is missing-commom ground fro. 23/301 vs feed from light switch 4/4.

[manovlov]

Thanks Vova585.
i do not like to do not know... I've found the guitly part : the rheostat.

That's an efficient forum : make users to use their brain...
Part replaced. Of course.

Manov

[Clemens]

what on god's green earth is a rheostat?

[Vova585]

Manovlov referring to-Light switch assembly with built
in brightness adjuster(rheostat)

[volvolugnut]

Rheostat = manual controlled variable resistant device

volvolugnut