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  • No Crank..Shame on Me!

    Turned the key on my 76 and zero, zip, nada, no sound, no crank. Grabbed my multi-meter with the "Load Pro" leads and found I had a very large voltage drop (about 7.5 volts) at the negative battery terminal!

    The "shame on me" part is that I haven't done my normal yearly maintenance on the battery terminals and cables in a long while. If you have one of these quick disconnect terminals, it would be time well spent to take it completely apart and clean all the contact points including the screw threads that pass current between the two halves of this gizmo.

    Car snaps to life now and it turns over like I have a new battery.

    Cheers,

    Wolf

    Click image for larger version

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    76 TR6 CF58170UO (The Lady)
    72 TR6 CC80068UO (The Slut)
    68 TR250 CD4893L (retirement project)

  • #2
    Shame shame shame everybody knows your name. 😎. I actually keep those in stock and use them on every car. Haven't ever had that experience, but good to know. I will clean them. The Delft car that I just sold ships to Florida next week and it might not be a bad idea to service the shutoff before it leaves. Thanks for the heads up.

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    • #3
      I have one of those but I always keep it made up unless I am working on the car and have to disconnect the battery. No corrosion between the surfaces that way.
      I72 Pimento w/overdrive

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      • #4
        The threads, also as much, the bottom brass contact surface area of the knob too....

        Good catch.
        '74 TR6 CF13007U aka "Mr. T"
        Custom Blue (Delft-Like) and New Tan (Formerly Mallard and New Tan)
        Points, Ballast Bypassed, Bosch Blue Coil, Moss Cobalt Wires, Champion RN12YC plugs.
        Peaks and tweaks, but the spirit of Original
        Redlines always.
        My wife is the Driver, I'm just the Mechanic....

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        • #5
          Originally posted by lfmTR4 View Post
          I have one of those but I always keep it made up unless I am working on the car and have to disconnect the battery. No corrosion between the surfaces that way.
          Lou, if by "made up" you mean that you keep yours in the closed (conductive) position, that's the way I keep mine too. I'll bet I haven't disconnected it at all in the past two years.
          To be fair, the resistance, i.e., corrosion, could have been between the circular stud part where it connects to the cable or it could have been between the battery post and gizmo. Anyway, it was a lot of resistance.

          Cheers,

          Kevin
          76 TR6 CF58170UO (The Lady)
          72 TR6 CC80068UO (The Slut)
          68 TR250 CD4893L (retirement project)

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          • #6
            Kevin, if it makes you feel any better I had the same experience earlier this year.

            After I got the car all buttoned back up from the engine bay project I had an intermittent problem where I'd turn the key and nothing would happen. Pop the hood, stare at the engine scratching my head, poke around little bit, try it again and it would start. This went on for a couple weeks because I assumed I got something crossed up when I re-installed the engine.

            Eventually I narrowed it down to the battery shutoff contacts. Cleaned those up and the problem went away.
            73 TR6
            Libertyville, IL
            My TR6

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            • #7
              That reminds me of one of my "shame on me" moments. My TR6 had been out of service for a while as I replaced the core (freeze) plugs. Before I started it, I did a full tune up, but when it came time to start the engine it cranked but wouldn't start. I tested for spark;check. I tested for fuel; check. I tested everything I could think of, no start. Finally, as I was cranking it I noticed that the distributor cap was moving as I cranked. I took off the cap to find that when I set the points I neglected to push the rotor down firmly and it was hitting the side of the cap. Pressed it on securely, it started on the first crank. Made me glad I was working alone, no witnesses to my embarrassment. ☺
              1970 BRG TR6 - Carbs by Poolboy!
              1968 BRG TR250

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              • #8
                And guess what.......... hopped in the car this morning to take it on a 100 miles round trip shake down cruise prior to heading to Stowe VT this weekend for The British Invasion..... click click went the starter..... weak beep beep went the horn and no headlights..... put my meter on the battery and it's fully charged..... then my eye fell to the Wolf battery cut off switch.... unscrewed it and tightened it back down and car roars to life..... so I took it apart and cleaned it even though it looked pretty good...
                1975 Mimosa with a few upgrades/mods:
                Patton TBI
                HVDA Toyota 5 speed
                Goodparts Nissan Diff
                Goodparts CVJs
                AAW Wire Harness
                Miata Seats
                Boyd Welding Custom 15 gallon aluminum gas tank

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                No Crank..Shame on Me!

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