Results 1 to 5 of 5

Thread: 74510-70A voltage regulator

  1. #1
    Join Date
    Jul 2015
    Posts
    110

    Default 74510-70A voltage regulator

    I found an obsolete OEM 74510-70A voltage regulator with the chrome housing for my 74 FLH. The factory upgraded the part number to a finned aluminum one. The OEM chrome one has the black wire that goes to the battery and also a red wire with a connector on it. The schematic in the service manual only shows the black wire. The picture in an old parts book shows the extra red wire in the picture but the updated one only has the black battery wire. Any help on where the red goes or if it is needed? Thanks.

  2. #2
    Join Date
    Aug 2004
    Location
    Beautiful Northern New Mexico
    Posts
    3,112

    Default

    Tachometer wire if I recall correctly. Been a long time since I messed with one of those set-ups.
    Robbie Knight Amca #2736

  3. #3
    Join Date
    Dec 2006
    Location
    Sandy Run, S.C.
    Posts
    171

    Default

    You are correct. It is a tach wire.
    Ride 'em. Don't hide 'em.
    Dan #6938 FUBO

  4. #4
    Join Date
    Aug 2016
    Location
    South Jersey
    Posts
    6

    Default

    Bringing this Thread back up.

    I have the same regulator/rectifier on my 74 FLH. Should I attach both the red and black wires to the + battery post or should I just cap off the red one?

    Thanks for any info.

  5. #5
    Join Date
    Jul 2015
    Posts
    110

    Default

    If I recall correctly the black wire goes to the battery and the red doesn’t get used.

Posting Permissions

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