FormaCars

Visit our community sponsor

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 4 of 4

Thread: RF Harness question/help

  1. 03-08-2018, 06:13 PM #1
    japollon
    japollon is offline
    Join Date
    Nov 2016
    Location
    Petaluma, CA
    Posts
    345
    Post Thanks / Like

    RF Harness question/help

    In the part of the wiring harness that carries the "alternator bundle," there is the red wire for the alternator, the blue wire for the starter, the orange and purple wires that go to the coil. There is also what looks like a dark gray or maybe lavender 16 gauge wire. What is that wire for? Help!!! Thanks, Joel
    Reply With Quote Reply With Quote
  2. 03-08-2018, 11:25 PM #2
    edwardb
    edwardb is offline
    Senior Member edwardb's Avatar
    Join Date
    Feb 2011
    Location
    Lake Orion, Michigan
    Posts
    10,850
    Post Thanks / Like
    The bundle of wires I think you're asking about I haven't seen as part of the alternator bundle. It's a separate group marked "Coil EFI/Crank." Is that the one? That bundle has Dk Green and Gray speedo signals (some EFI modules need the speed sensor signal), Orange and Purple Coil/Tach wires, and Blue crank power. That isn't the right wire for the starter. That's in another bundle. That one is also needed by some EFI modules.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014. Build 2: Mk4 Roadster #7750. Sold 04/10/2017. Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020. Build Thread and Video. Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020. Build Thread and Video
    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.
    Reply With Quote Reply With Quote
  3. 03-09-2018, 09:09 AM #3
    japollon
    japollon is offline
    Join Date
    Nov 2016
    Location
    Petaluma, CA
    Posts
    345
    Post Thanks / Like
    Judging from the schematic, it appears it is the gray "speedometer signal" wire. I'm not running any version of EFI so am guessing I just "terminate" that wire? Not connect it? Joel
    Reply With Quote Reply With Quote
  4. 03-09-2018, 11:05 AM #4
    edwardb
    edwardb is offline
    Senior Member edwardb's Avatar
    Join Date
    Feb 2011
    Location
    Lake Orion, Michigan
    Posts
    10,850
    Post Thanks / Like
    Quote Originally Posted by japollon View Post
    Judging from the schematic, it appears it is the gray "speedometer signal" wire. I'm not running any version of EFI so am guessing I just "terminate" that wire? Not connect it? Joel
    Yea, just cap off both of those speed sensor wires if you're not using them for EFI. There's another pair of speed sensor wires in the dash harness. Both pairs are from the connection to the trans in the rear harness. You may not use either if you have the GPS speedo.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014. Build 2: Mk4 Roadster #7750. Sold 04/10/2017. Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020. Build Thread and Video. Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020. Build Thread and Video
    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Brown County Customs

Visit our community sponsor