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Old 12-27-2013, 10:11 AM
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am3jay83's Avatar
Join Date: Jun 2013
Posts: 34
90 yj kill switch

My 1990 manual yj soft top has zero theft deterrent installed. While I very seldom drive it (it's currently not street legal in PA but will be by spring) I'd still like to install something to at least make it somewhat more difficult to simply hot wire and drive off with. I'm aware there is no full proof way to avoid getting a rig stolen however.
What I was thinking is a simple kill switch in parallel with the ignition coil. No spark, no start. This could also be helpful if I encounter an off-road water hazard that is deeper than expected. This second benefit may not be ideal but worth a shot to save my 4.2 in a pinch. Thoughts?

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Old 12-27-2013, 11:20 AM   #2
reno92's Avatar
Join Date: May 2013
Location: Cardiff By The Sea / Glamis
Posts: 2,004
A kill switch is a really good idea, I have an FI model so I'm going with a switch to shut off the fuel pump, the jeep will turn over but not keep running. I have seen a locking switch on the fuel line that you turn to cut off fuel. You want to find some way to not only stop it from starting, but stop it from being jump started. The coil idea sounds interesting, but that's a pretty big wire to run a switch to isn't it?

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Old 12-27-2013, 11:41 AM
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Join Date: Jun 2013
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I've got a carb so the ignition circuit is very simple. The pre-coil leads are only 14 or 12g at best. They don't carry the full ignition amperage load so a simple toggle switch will work. Was even thinking of putting in a pull so it looks more like a manual choke opposed to an on/off switch. I have to replace the busted coil connector anyway so figured I'd do it then since the wires are getting spliced anyway.

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