How many volts to run the starter?

Discussion in 'Sparky's corner' started by FormerGNowner, Mar 4, 2017.

  1. FormerGNowner

    FormerGNowner Well-Known Member

    I get a good strong click from the solenoid, then absolutely nothing as far as turning the starter motor over. I'm seeing some big voltage drops, but don't know if they are too much.

    12.2V across the battery posts
    11.0V at the back of the ignition switch
    9.5V at the fuse block during crank
    8.25V at the S post on the starter during crank

    If I hear that 8+ should still turn the starter over, I'll open it up and clean the ring.

    TIA
    Loren
     
  2. TexasJohn55

    TexasJohn55 Well-Known Member

    Sounds like a good hot battery will fix it. 12.2 is not fully charged, need to see 12.7 or higher. I have seen starters that would not engage on that even though they should.
     
  3. SteeveeDee

    SteeveeDee Orange Acres

    Take the battery out and take it to the parts store (after you charge it) if the car still doesn't start. Right now it is basically dead. Minimum voltage is 12.6 for a fully charged battery. Depending on where you checked the voltage, it is possible that all you have is corroded connections. One thing at a time, to get the correct diagnosis and replace only what needs to be replaced.
     
  4. FormerGNowner

    FormerGNowner Well-Known Member

    Thanks guys, it starts with 12.6 at the battery. I have a 40A Bosch relay in hand to ensure that I get closer to battery voltage to the starter.
     
  5. TexasJohn55

    TexasJohn55 Well-Known Member

    Thanks for the reply to let us know.
     

Share This Page