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Clutch switch issues - how to bypass it?

Discussion in '6.9L IH & 7.3L IDI Diesels' started by Hobbywelder, Sep 22, 2020.

  1. Hobbywelder

    Hobbywelder Registered User

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    Hey folks, im looking for how to bypass my clutch safety switch. Its gone bad, again.

    ive tried a few different methods without damaging the connector but im not getting anywhere so im wondering if someone else has done so with the 6-pin connector.

    ive also heard that the auto trucks have a connector cap that would work too, anyone know? Or willing to take a photo for me?

    ill probably head to the junk yard and snag a couple in case I screw up.
     
  2. chillman88

    chillman88 Supporting Member Supporting Member

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    That's exactly what I did with mine. Just find an auto truck in the junkyard and pull the plug out of the harness where the clutch switch would be.
     
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  3. Hobbywelder

    Hobbywelder Registered User

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    Ill know shortly. I picked up 3 of them from a ‘90, ‘92 and ‘95 so one should work lol.
    Plus a spare harness in case, which I can see someone at least tried to bypass with.

    image.jpg
     
  4. Oldfrogdiving

    Oldfrogdiving Registered User

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    Nice every truck I have checked has been pulled!
     
  5. Hobbywelder

    Hobbywelder Registered User

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    -cussWell dang it, that didn’t work.....

    Either that or the harness is bad which I did de-pin 2 spots so maybe.

    Just a footnote, I did replace my ignition switch, have power across the board and can jump by bridging the connections between the starter solenoid so all I have left is the CSS unless im missing something here....
    Dash lights up, turn the key and the odo goes blank like im not pushing the clutch in....

    I finished de-pinning it, tried to just straight connect to the plate and nada.
     
    Last edited: Sep 22, 2020
  6. franklin2

    franklin2 Full Access Member

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    You may have the famous broken piece inside the steering column if you have a tilt wheel. And some people do not know they have a tilt wheel, you press forward on the turnsignal switch to release the wheel.

    If you have tilt wheel, take the short cover off near the cluster that goes around the steering column. Move the keyswitch back and forth, you will see a small rod on top moving back and forth. Take some pliers, and then turn the key as far as it will go to the start position and hold it. While doing this, grab the small rod on top of the column and "help it" move toward the cluster a little further. If the truck cranks over, you have the broken piece inside the column. It's made of pot metal. It's so common, they sell this weird piece in the parts store and probably even have it in stock.
     
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  7. cozinsky

    cozinsky Full Access Member

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    The two red wires with blue stripes are the crank wires. If you jump them together it will bypass the clutch switch. I bypassed the switch on my 92 with a snap lock splice, joining those two wires without cutting them.
    I had problems on my 84 a few years ago with an intermittent no crank. I finally traced the problem to a bad connection at the jumper plug in the frame rail where the automatic transmission would connect.
     
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  8. Hobbywelder

    Hobbywelder Registered User

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    Funny you mention that, because I do have tilt steering. And I did find that I had a broken ignition switch and replaced it (parts stores all had it in stock), the interior parts of the steering column are good. Its also a rebuilt one Which helps. I broke one 4 years ago.

    I totally forgot to check the starter solenoid.... oops!

    now I DIDN’T know to press forward on the turn signal to release the wheel! Learn something new every day!
     
  9. franklin2

    franklin2 Full Access Member

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    Here's that piece that likes to break inside the column.

    [​IMG]
     
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  10. Clb

    Clb Another old truck Supporting Member

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    A one wire jumper is all thats needed!
    If ya cannot figure it out I can go look at my 93 for ya.

    Haha Repost...
     
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  11. Hobbywelder

    Hobbywelder Registered User

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    at the rate im going I might, I might need a new brain and sanity too. I will let you know tomorrow.

    I traced wired today and alls well. So... i just decided to replace the solenoid because I put a generic one on last time I had starting issue. if that doesn’t work, im out of ideas. Key causes action so I know it gets to the ignition switch. Battery and starter work. Solenoid seems to work. Rewired the CSS to be like the auto trans.
     

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