Results 1 to 2 of 2
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15 November 2017 #1
- Join Date
- 06 Jun 2017
- Location
- france
- Posts
- 7
- Saab(s)
- 9-5 2.3lt 1998
A/C recirculation flap motor electrical repair tuto
Hi ,
I would like to share something i didn't find in any forum . I had a problem on my 98 9-5 with the recirculation flap motor , which wasn't working.
The motor and gears were running fine, but won't run when fitted into the car. I discovered a small grey cube (about 2x2x2cm) just near the plug on the dashboard side with black glue inside .
Here's the interesting fact :
this small cube is acually part of a small wiring harness as you can see (on the picture little cube has been disassembled) :
When i applied 12v on the motor WITHOUT the small harness , lever turned well but once in contact with the casing it wouldnt stop , propably causing the death of plastic gears.
When i applied 12v on the motor WITH the small harness, no reactionat all ...
After boring work of removing the black glue , here what you can discover inside :
I decided to show this thing with friends having electronic skills . They told me that this 5 components , to make a long story short , are acting like a current limiter , switching off the supply when lever is in contact with the plastic case (and then motor is asking more current).
So , i changed all the components on this small circuit , here's the BOM
2 zener diodes BZX85-C6V8
2 diodes 1N4007
1 resistance 68ohm 3W
After some soldering , everything works PERFECTLY
Hope it will help some of you , as frustrated as i was before this small fix !
Frederic
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16 November 2017 #2
- Join Date
- 28 Oct 2016
- Location
- Minneapolis Minnesota
- Posts
- 1,136
- Saab(s)
- 2006 9-3 2.0t SportCombi
Welcome to the exciting world of automotive electronics
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