Body, generic

B0950 Heated Rear Window Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

None of the accessible J2012 lists, OEM manuals or NHTSA bulletins mention B0950; it is therefore unverified. The title refers to the electrically heated rear window. GM-era Saab cars monitor this heater under other numbers: in the 2011 Saab 9-5 the climate control module energises the relay coil that switches battery voltage to the grid, and faults on that control line are stored as B0283. The 9-3 checks the relay output in the rear electrical centre (B0283 06 below 6 V) and the indicator lamp in the button separately (B0969 02 above 1 A). A broken grid line or a loose tab on the glass usually disables only part of the heated area, while relay or supply faults stop it entirely. The main consequence is poor rear visibility in cold or damp weather.

Likely causes

Broken heater line or detached terminal tab on the glass
Rear defogger relay faulty
Wire break in the tailgate or boot lid harness
Climate or body control module output faulty

Symptoms

  • Rear window does not clear when the heater is switched on
  • Only some heater lines warm up
  • Indicator in the button does not light

Repair estimate

DifficultyEasyDIY possible
Parts and labour€10–400
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

rear window heating elementrear defrost relaybody control module

Related codes

B0283B0610

References: saabwisonline.com, saabwisonline.com, saabwisonline.com.