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Unread 12-17-2014, 08:11 PM   #1
GTNMUDY
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1984 CJ7 
 
Join Date: Jan 2013
Location: MADISON, WI
Posts: 207
CJ-7 ignition switch issue

When I hit the starter on my CJ-7, the engine will crank but not fire. If i then move the switch from the starter position back to the normal on position the engine will then fire. Some times it runs backwards and some times it runs the right way.

Sometime it works just great.....

I got 225K on the chassis and switch so I'm thinking the switch is going out.

If i am reading the schematic correctly the switch in the starting position will short out the ballast resistor to give full voltage to the coil.

When the switch is in the on position the ballast resistor is back in line with the coil and points.

Any thoughts

If it wasn't such a pain in the A$$ to replace I would do it in a heart beat.

Getting too old to lay on my back and my bifocals wont let me see it in focus

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Unread 12-17-2014, 08:25 PM   #2
Mike Romain
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1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 14,024
The wire that is broken goes from the side "I" terminal on the fender solenoid to the coil. It joins the coil power wire at a crimp connection about a foot from the coil inside the loom. This connection should have factory duct tape on it because it can get too hot for electric tape. They break at the crimp. A new crimp is needed, soldering the wire will damage it.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 12-17-2014, 08:46 PM   #3
GTNMUDY
Registered User
1984 CJ7 
 
Join Date: Jan 2013
Location: MADISON, WI
Posts: 207
Quote:
Originally Posted by Mike Romain View Post
The wire that is broken goes from the side "I" terminal on the fender solenoid to the coil. It joins the coil power wire at a crimp connection about a foot from the coil inside the loom. This connection should have factory duct tape on it because it can get too hot for electric tape. They break at the crimp. A new crimp is needed, soldering the wire will damage it.
Thanks, I did forget to mention I have swapped a SBC, 100K miles ago. The crimp you are referring to is against the firewall?

I did keep most To the orig wire harness and only used what I needed to make the swap.

Worst case would be to just put a push button to engage the starter coil.
__________________
If it breaks once, shame on it. If it breaks again, shame on me.
Fix it right or better the first time.
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Unread 12-17-2014, 09:02 PM   #4
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 14,024
Quote:
Originally Posted by GTNMUDY View Post

Thanks, I did forget to mention I have swapped a SBC, 100K miles ago. The crimp you are referring to is against the firewall?

I did keep most To the orig wire harness and only used what I needed to make the swap.

Worst case would be to just put a push button to engage the starter coil.
There is a wire that gives the coil power when the starter turns. It comes off the starter solenoid. On a cj engine it joins the ballast wire about a foot from the coil.
__________________
Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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