check stop light
#1
#2
#5
Fuse 11D/3 (most likely cause of problem) in the rear electronic module (REM), rear of car, left side OR
Relay 2/79 In the REM OR
Brake shunt component 20/31 in the REM
It looks like these components supply power to the left and right side brake bulbs only, not the top brake strip so this would explain why the top brake strip still works.
Relay 2/79 In the REM OR
Brake shunt component 20/31 in the REM
It looks like these components supply power to the left and right side brake bulbs only, not the top brake strip so this would explain why the top brake strip still works.
#6
^^They have the best solution...
however for what it's worth, I have had brake lights, running lights, AND backup lights fail to light on both my V70 and my S80. I quick slap to the taillight housing has fixed it every time. I don't know what it is, but something gets loose once and a while and the bulbs fail to light.
If it's the shunt and not the fuse, it's a dealer part, they're $9 I believe. I've had my turn signal shunt fail in the past, and bought two and keep one in the glovebox just in case.
however for what it's worth, I have had brake lights, running lights, AND backup lights fail to light on both my V70 and my S80. I quick slap to the taillight housing has fixed it every time. I don't know what it is, but something gets loose once and a while and the bulbs fail to light.
If it's the shunt and not the fuse, it's a dealer part, they're $9 I believe. I've had my turn signal shunt fail in the past, and bought two and keep one in the glovebox just in case.
#8
In the rear cargo area, behind the left (driver) side removable panel, you'll find the REM. the shunts are the wide black ones. Swap out the brake light one with another on the panel and see if it fixes the problem. If it does, you have a bad shunt. You need part # 9442190. I've attached a screenshot from Vadis showing the shunt, and where they go.
#13
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eliotb
Volvo 850
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08-27-2007 11:37 PM