How to do jumper for 1970 Johnson

sevanseriesta

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I am going to do a compression check on the engine tonight and I am not sure how to do a jumper to start the motor. I know it needs to connect to the battery but where do I put that wire since it already has a power wire running from the starter solenoid to the battery?

Sorry for such the newb question, I have never done this on a car either.
 

Silvertip

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Re: How to do jumper for 1970 Johnson

You use one jumper cable. Connect one end to the POSITIVE terminal on the battery and touch the other end to the large post on the solenoid that does NOT have the other positive cable on it. Or, you can use a screwdriver to simple short the two large posts on the solenoid together making sure you touch no other metal. Or you can make a simple remote starter from a simple push button switch. Connect one wire from the switch to the POSITIVE battery cable terminal on the solenoid. Connect the other wire from the switch to the small terminal on the solenoid that comes from the "S" (start) terminal on the ignition switch. Push the button and the engine will crank.
 

sevanseriesta

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Re: How to do jumper for 1970 Johnson

I definently dont want to be a giant girl, but when I did this method very large sparks every time, is this correct? I just want to make sure so I dont fry something. I may just make the remote start so I dont have to worry about it. I obviously need to reinforce my motor stand also cause just trying to start, it wants to drive right off my stand.
 

F_R

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Re: How to do jumper for 1970 Johnson

I definently dont want to be a giant girl, but when I did this method very large sparks every time, is this correct? I just want to make sure so I dont fry something. I may just make the remote start so I dont have to worry about it. I obviously need to reinforce my motor stand also cause just trying to start, it wants to drive right off my stand.

Yes, expect large sparks when doing that. Us old guys do that all the time, but it is NOT the best way or the safest way. In fact, it can do serious damage. I do not recommend it.

The remote starter button is a great way, but you can do the same thing with a piece of wire. Connect one end of the wire to the battery + terminal, and touch the other end to the small terminal on the solenoid that has a white wire coming from the key switch. That, too, will make a small spark if you don't make a quick, firm contact. NOTE: The other small terminal on the solenoid is either grounded, or goes to a safety switch. You MUST NOT connect your jumper or remote start switch to the safety switch, if it has one. It will instantly destroy the switch if you do. You cannot disconnect it fast enough to prevent destruction.
 

sevanseriesta

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Re: How to do jumper for 1970 Johnson

I think I am just going to use the push button I have one of those lying around from a car project I was going to do. I have braced the engine brace also so the motor does not drive off on me. Last thing I need!
 
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