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Audace electrical question help??

Discussion in 'Cal 1400 8V' started by BigL, Mar 30, 2021.

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  1. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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    Thank you Paul. Now waiting to hear back from the Original poster.
     
  2. BigL

    BigL Just got it firing!

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    +1 Thank you Paul!
    Scott, so yes the rears are the oem the front turn signals are aftermarket incondescent 10w orange bulbs (just like the oem bulbs)?
     
  3. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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    Ok. Next question.

    Did it ever work correctly in this configuration?

    When did it stop working and did you change anything at that time?
     
  4. BigL

    BigL Just got it firing!

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    1) No

    2) At first I tried on some led bulbs up front and it did the usual fast flashing but worked normal, then suddenly when I went to try it on again and see if I like the led look I noticed this issue at that point I switched back to the OEM set to see if it goes away and it was still acting up..so finally I decided to not use those led turn signals and instead i put on the current aftermarket non-led blinkers carrying over the issue
     
  5. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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    Given that it has never worked, it stands to reason that the wiring has been messed up by someone.

    The rear lights are integrated LED’s. They have polarity requirements.

    So, has the factory wiring loom been cut or modified in the rear? If the connector to the LED’s on the fender has been unplugged, is it possible that it is it fully seated correctly? It may be useful to check the connectors by disconnecting them and visually inspecting the pins and their condition. Is one bent or broken?

    Where did you “add” this ground wire you speak of, and how did you join it to the wiring loom?
     
  6. BigL

    BigL Just got it firing!

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    With the first set of LED's I actually tapped into the loom for the front turn signals using the plastic snap quick taps as well as from the running light underneath the right front corner fairing where all the wiring goes down. Unplugging and replugging did occur there, but then when I decided to skip using the LED'S I taped it all back and none of the wires were cut in half upon inspecting them.
    The rear turn signal hasn't been unplugged however I did tap into the right rears ground by stripping the ground to join in and tightened the metal ring underneath a frame bolt around the fender which didn't do the trick so I reversed it and taped it up.
     
  7. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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    Given that you cut into the loom in the front and rear, I would use a volt meter and check the voltages that you are receiving at each signal position.

    I would also use some inexpensive alligator test clips from like Harbor Freight Tools, and switch the wiring between the tail lights to see if the issue follows the light or the wiring.

    image_16393.jpg
     
  8. Rickhinnz

    Rickhinnz Tuned and Synch'ed GT Contributor

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    Another possible issue is the CAN BUS system does not like seeing changes to the wiring system. Simple things such as differing wire lengths between the +ve $ -ve loads cause impedance mismatches.

    cutting into a CANBUS system needs to be done carefully
     
  9. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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    I was beginning to wonder if this is a CAN bus. It’s behaving very much like one. CAN bus is designed for message based transmission and as I stated earlier, there are terminating resisters on the bus and the values they provide to the system are critical.

    If it is indeed a CAN bus, then there are all sorts of gremlins that are let loose by cutting into the bus which is why I always strongly attempt to discourage cutting into a healthy and unmolested wiring loom.
     
    john zibell likes this.
  10. BigL

    BigL Just got it firing!

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    Thank you gentlemen for all the input. I'm currently working on the MGX and my cousin has possession of the Audace. I will definitely look into testing the power health delivery in the lines once he's done having fun with it and decides to drop it off lol. Will report back with an update
     
    John L likes this.

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