Forum Discussions about this Product

1. P

   Very confused about the C33-E connector, using engine run to trigger my battery charger

   • Princess_Fluffypants
   • 4 mo ago
   • Camper Vans and Conversions

   2

   696

   4 mo ago

    by Sams stock van
   1. N

      natecostello

      · Registered

      Joined Aug 8, 2017

      ·

      454 Posts

      #2 · 4 mo ago

      Only show this user

      This isn't going do much to answer your question, but maybe give confidence that you can ignore/maintain that same shorting connector, and use the other two pins as others have and get the right behavior:
      
      From my writeup of my wakespeed install:
      
      The Wakespeed needs to know if the engine is actually running before it applies field current to the alternator's rotor. We mostly followed @Maia's documentation on the forum. We removed a wall panel to access one of the "spare" duplex runs from the battery compartment to behind the driver seat. We used methods described by Maia and the owners's manual to access the C33-E connector, without removing the seat! We wired a pigtailed relay socket to the duplex prewire and to a pigtailed C33-E connector as follows:
      
      

      • Relay Pin 85 Coil+ (BLACK) TO C33-E Pin 6 Ignition
      • Relay Pin 86 Coil- (WHITE) TO C33-E Pin 2 Engine Run
      • Relay Pin 87 Normally Open contact (BLUE) TO 24V source duplex prewire (RED)
      • Relay Pin 30 Return contact (RED) TO "ENG RUN" signal return duplex prewire (BLACK)

      We noticed that pins 4 and pins 9 were connected together (load shed ground in and load shed ground signal out) in the dummy C33-E connector that we removed, so we connected those to wires on the pigtailed connector just in case that important. It has no bearing on what were doing for the wakespeed.

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2. 

   Need help to buy a 12v relay

   • MaxIsTheDog4U
   • 2 mo ago
   • Electronics, Audio, and Lighting

   5

   310

   2 mo ago

    by MaxIsTheDog4U
   1. N

      natecostello

      · Registered

      Joined Aug 8, 2017

      ·

      454 Posts

      #5 · 2 mo ago

      Only show this user

      I used a different bosch relay, but to the same effect. Here's the relevant excerpt of my writeup on the subject:
      The Wakespeed needs to know if the engine is actually running before it applies field current to the alternator's rotor. We mostly followed @Maia's documentation on the forum. We removed a wall panel to access one of the "spare" duplex runs from the battery compartment to behind the driver seat. We used methods described by Maia and the owners's manual to access the C33-E connector, without removing the seat! We wired a pigtailed relay socket to the duplex prewire and to a pigtailed C33-E connector as follows:
      
      

      • Relay Pin 85 Coil+ (BLACK) TO C33-E Pin 6 Ignition
      • Relay Pin 86 Coil- (WHITE) TO C33-E Pin 2 Engine Run
      • Relay Pin 87 Normally Open contact (BLUE) TO 24V source duplex prewire (RED)
      • Relay Pin 30 Return contact (RED) TO "ENG RUN" signal return duplex prewire (BLACK)

      We noticed that pins 4 and pins 9 were connected together (load shed ground in and load shed ground signal out) in the dummy C33-E connector that we removed, so we connected those to wires on the pigtailed connector just in case that important. It has no bearing on what were doing for the wakespeed.
      
      After a last minute measurement of coil resistance to make sure it doesn't violate the BEMM, we then plugged a normal Bosch 12V automotive relay into the relay connector.
      
      Back in the battery compartment we:
      
      

      • Wired a 24V source to the prewire duplex (RED)
      • Wired Wakespeed IGN (BROWN) to our new ENG RUN signal on the prewire duplex (BLACK)

      Following all that we started the engine and listened for the click of the relay: Click. The proper test would have been to verify the signal with a meter, but I had already closed the patient.

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