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| OEM Tech Discussion Forum for OEM (Original Equipment) or stock XJs and MJs. |
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#1
February 3rd, 2023, 13:00
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‘99 4.0 - DIY ignition kill switch
Car jackings and thefts are all over the news here recently…driving an XJ should be enough of a deterrent, crazier things have happened though.
Planning to build up a small, simple hidden switch circuit to cut igniton to the starter. Most likely a relay to an on/off/momentary setup for future expansion (think remote start) Does anyone have jpg or a link to the FSM wiring for the 98/99 ignition? Sent from my iPhone using Tapatalk 
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#3
February 3rd, 2023, 13:54
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‘99 4.0 - DIY ignition kill switch
Quote:
Pull fuel pump relay. 100% reliable all the time  Im too lazy for that. And id rather not monkey with electrical to fuel supply. Around here, thats asking for future problems. So starter solenoid kill switch is the other viable option. I could, in theory, wire it into my power antenna/remote wire on the head unit so that if the unit doesnt have power, the jeep aint gonna start Sent from my iPhone using Tapatalk
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#4
February 3rd, 2023, 14:36
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‘99 4.0 - DIY ignition kill switch
Or, move out or the area. That also works 100%, 99% of the time
Sent from my iPhone using Tapatalk
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#5
February 3rd, 2023, 14:45
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Re: ‘99 4.0 - DIY ignition kill switch
https://cruiser54.com/?page_id=365 has some good info.
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#6
February 3rd, 2023, 16:58
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Re: ‘99 4.0 - DIY ignition kill switch
I learned the hard way that if you ground out your O2 sensor your engine will not run.
__________________
Project "Scope Creep": 1996 4wd 4.0L, AX15 The "Varmint-Mobile": 1997 ZJ Laredo, 4wd, 4.0L, Slushbox
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#7
February 3rd, 2023, 17:43
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Re: ‘99 4.0 - DIY ignition kill switch
Quote:
 My 1996 is not included. Now I really feel I am the Red headed stepchild. Never mind, I have a factory CD based manual.
__________________
Patrick  #5941996 XJ; 4.0L; AW4; NP231; SYE; D30 and D44; ECTED; 4.10 gears; 30X9.5 -15 BFG/AT/KO; 3" lift; Rusty's LCA; JKS ADJ UCA; Kevins ADJ Track bar; Drawtite Front Receiver; Dual Electric Fans; Dual Battaries.
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