gbjeppm
MB Enthusiast
- Joined
- Oct 31, 2006
- Messages
- 1,782
- Location
- Surrey
- Car
- C207 E Coupe 350cdi, W166 ML 250 Cdi Sport, R171 SLK 350, Suzuki V Strom DL650
HI All,
Hoping somebody has seen this before as it is driving me somewhat crazy.
A friend of mine has an R170 SLK320 from 2000, it has has a number of issues which i am steadily working through.
The final issue is that the blower motor/fan for the interior heat/AC does not work at any setting, The control panel behaves as expected, the EC. Recirculate and Rear Window lights all work as expected.
I took the blower motor out and tested it and the regulator on the bench, and all fine.
I then test for power at the incoming plug, which has 3 wires, 12v switched, Ground and Variable from the console switch between 1-5 for fan speed.
There is no power at the 12v switched with engine running, or ignition on or off for that matter, but i do get between 2 and 6.5 V at the variable wire as you would expect.
So that leads me to think fuse, but i have tested all of them multiple times and they are fine, and everything else on the car works.
So i am at head scratching mode. Any ideas welcome.
I have had issues with the K40 relay (no engine start and radiator fan running, i have fixed those by resoldering the relay), and i am now assuming there is no relation with the K40 and the interior blower, if somebody could confirm?
Also if somebody has access to WIS could you get me a wiring diagram for the heating/cooling system.
Thanks in advance
Matt
Hoping somebody has seen this before as it is driving me somewhat crazy.
A friend of mine has an R170 SLK320 from 2000, it has has a number of issues which i am steadily working through.
The final issue is that the blower motor/fan for the interior heat/AC does not work at any setting, The control panel behaves as expected, the EC. Recirculate and Rear Window lights all work as expected.
I took the blower motor out and tested it and the regulator on the bench, and all fine.
I then test for power at the incoming plug, which has 3 wires, 12v switched, Ground and Variable from the console switch between 1-5 for fan speed.
There is no power at the 12v switched with engine running, or ignition on or off for that matter, but i do get between 2 and 6.5 V at the variable wire as you would expect.
So that leads me to think fuse, but i have tested all of them multiple times and they are fine, and everything else on the car works.
So i am at head scratching mode. Any ideas welcome.
I have had issues with the K40 relay (no engine start and radiator fan running, i have fixed those by resoldering the relay), and i am now assuming there is no relation with the K40 and the interior blower, if somebody could confirm?
Also if somebody has access to WIS could you get me a wiring diagram for the heating/cooling system.
Thanks in advance
Matt