2012 Volvo Daycab No Brake Lights on Truck or Trailer

Discussion in 'Volvo Forum' started by Smellfunny, Sep 28, 2020.

  1. Smellfunny

    Smellfunny Road Train Member

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    Trying to figure out where the brake light switch (if it has one) is located. I see a box on the crossover that looks similar to AMU on Freightliner. Is one of those the box for brake lights? If so which one? Volvo AMU.jpg
     
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  3. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Should be under panel behind clutch pedal. They usually have labeled tags on them.
     
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  4. Smellfunny

    Smellfunny Road Train Member

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    I found several air switches but none have power to them. I checked all of the fuses and relays and all appear to be fine. The ones that I think might be for brakes were marked E1 and D1 (if I remember right) But none had power to them. There was one that had brake on it and we replaced that one with another air switch from a different Volvo but nothing.
     
  5. nasriza

    nasriza Road Train Member

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    if you look on the firewall, there is a 1/4 line coming in blk hose other side of it is the SLS switch or look on the inside of the manifold for SLS written on manifold.
     
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  6. Smellfunny

    Smellfunny Road Train Member

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    They took it to the dealer. Will find out what it was hopefully. They said it would be two weeks.
     
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  7. Snailexpress

    Snailexpress Road Train Member

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    WOOOOOOWWWWWWWWW
     
  8. Smellfunny

    Smellfunny Road Train Member

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    LOL Well that truck went to Volvo and they said it was the brake light switch. Same truck is back today with no brake lights to just the trailer this time. I hate dealing with Volvo.
     
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