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Bosch reverse lights relay connection 120-130

posted by  CARRODEL70 on  Thu Jul 31 12:46 CST 2008
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last visit: Fri Aug 27 03:45 CST 2010
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list members,I'm trying to connect a new reverse light Bosch relay ( 0332 019 150 ), when I bought 1964 122s all lights except reverse were working (I have upgraded the brake switch with SwEm kit ) the old rectangular relay came disconnected , and may not have worked, although I not sure. The wiring diagram I’m using identifies a brown,gray,black as the wires controlling the relay, I cant see a brown wire in this area of my car,there are five loose wires clustered in the vicinity of the brake master cylinder but I have managed to identify three wires that seem to activate the reverse lights 1. black ( hot ) 2. Grey (lights) 3. Black (tranny reverse light switch ) ,please advise me if I’m wrong , wires 4. Grey and 5. White are a mystery. my question is What is the order i.e. color to number that needs to be connected to the new Bosch relay? The new relay hasfive tabs with the following numbers 85, 86, 87, 87 ,30
Thank you in advance
Luis








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    Bosch reverse lights relay connection 120-130

    posted by  planetman on  Thu Jul 31 14:51 CST 2008
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    last visit: Fri Oct 24 09:29 CST 2014
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    Hello,

    What you have is what is commonly refered to as a "change over" relay and is commonly used for all types of accessories like foglights and it is not the same as the original, but can be wired to work as a replacement.

    The original Volvo relay had only 3 terminal as it was internally wired to pass the voltage that is normally only used to switch the relay.

    BTW, if you wanted a 3 terminal reverse light relay, Volvo still sells them.

    But they are a reproduction and do not look like the original and they cost over $20.00 and might be closer to $30.00.

    If you look a little closer to the markings on the relay, you will see that the center terminal is actually labeled 87a and will not be used for the reverse lights.

    Connect the black wire with positive voltage to terminal 30 and make a jumper to supply power to terminal 86.

    Connect the grey wire to terminal 87 and the black wire from the transmission switch to terminal 85.

    The extra grey wire is connected to the headlight dipper switch part of the turn signal switch, which was not connected for the USA market.

    I am not sure what your white wire is, but make sure that if it does have power, that you insulate it so it won't blow a fuse.

    --
    Eric
    Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
    Torrance, CA 90501








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      Bosch reverse lights relay connection 120-130

      posted by  CARRODEL70 on  Thu Jul 31 16:32 CST 2008
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      last visit: Fri Aug 27 03:45 CST 2010
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      Eric, I met you and we briefly spoke at the Volvo/ Saab gathering at Ricky and Ronnie's in Torrance, I was there with my 70 1800e. I'm looking forward to taking my cars to your shop, as the budget permits.
      Your post is very helpful and clear,thank for the generous input.
      I will follow your suggestions.
      Luis








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    Bosch reverse lights relay connection 120-130

    posted by  RepairmanJackal on  Thu Jul 31 13:10 CST 2008
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    last visit: Tue Jun 10 09:52 CST 2014
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    That relay sounds like a headlight dipper relay and not a reverse relay.
    Do you have a picture? You might be able to make it work with some proper wiring.

    Check out this link http://www.classictruckshop.com/clubs/earlyburbs/projects/bosch/relay.htm

    All of the relays (reverse, overdrive, horn, etc) on my 65, 67, and 68 - except the high/low beam - are the 3-prong "can" relays. I think that's what you need to get. I have a bag of them somewhere...








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      Bosch reverse lights relay connection 120-130

      posted by  CARRODEL70 on  Thu Jul 31 16:13 CST 2008
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      last visit: Fri Aug 27 03:45 CST 2010
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      Repaimanjack, Thank for the link I'm trying to understand, learn and apply what is basic to others so sites such as the one you shared is greatly appreciated.I'm compiling stuff like that and studying them.
      In fact the relay that this car came with had only three prongs, and now I understand from Eric"s post why I was guided to the new Bosch relay as a substitute.
      Luis







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