my switch doesnt work, doesnt matter if i set 1 or 4.

i have a vacum controled unit. So only AC/max works ok. But when i'm driving, sometimes it just turns on and it works ok, but it dies again.

i dissasembled whole board (replacing bulbs) so i checked everything, everything is OK, so it's not the vacuum or switch. i even try to measure electricity (+ line) going to fan switch. here is a problem. Sometimes switch gets power, but most time its without power.

I tried to manualy add + on switch, but only speed nr. 4 works!


im worried that vacuum based board is dying on me.

pls help

tnx

Sounds like the resistors that control the various speeds have gone, I cant remember offhand where they are but my dim memory says they are in or near the blower unit / fan, basically they are just short coils of resistance wire, mounted on a small board.
Grendel

ok, tnx i will check it.

Just found my haynes, which says its behind the glove box, alongside a relay, its a component mounted on a bracket with a connector,as far as can see its near the fan unit.
Grendel

can you pls scan picture, where location is shown.

tnx

mail: vojnimir.nikolajev@gmail.com

ok, i found that resistors, everything is ok, the resistors work (measured them). So anything else to check or the main unit has gone?

Erm, could be the switch or the supply to the switch?
Grendel

switch is ok, its the supply of switch. supply comes from main unit :(

can you not run a new supply from a secure location?
Grendel

if i do that, only fan nr 4 works, other is dead, when i try no. 4, i hear a click in main unit when the fan switches on

ok, problem solved for now, i opened main unit, disconected the red wire and connected it with white/black wire located right near the red one.

Hope this will work

tnx for help