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-   -   Hotwiring '90 4.0 XJ ? (https://www.pirate4x4.com/forum/showthread.php?t=990804)

Fudpucker 07-03-2011 12:03 PM

Hotwiring '90 4.0 XJ ?
Should be simple enough :laughing:

My ignition switch is gone and the stearing column "casing" is fawked.
I can still start it just fine with a pair of pliers tho.

I want to set up en external ign switch that breaks the main power to the oem ign switch. Figure i could just leave the old switch "on" and use a "off", "on", "start" switch in series with it.

This chart has me a bit puzzled though :


Do i really need the switch to make the ground connection or could i just leave those hardwired?

95rodeo 07-03-2011 01:19 PM

Ground is usually just a key sense wire. I'd leave it unhooked, if it's connected with the ignition off you will have the damn door buzzer going off

Fudpucker 07-03-2011 01:31 PM

Makes me wonder if they're for some sort of relay connection, since they only connect in the "start" position.
I'm just concerned i'll fuck up some sensor or computer shit messing with this..

Fudpucker 07-06-2011 02:54 AM

According to this the Park brake switch and engine coolant temp sensor are grounded when the key is in the "start" position :confused:


Fudpucker 07-07-2011 01:53 PM

Still have no fawkin idea wtf that ground connection crap at "start" is supposed to do.

I just wired a killswitch in the thick red wire and a pushbutton start switch from red to dark green. Fired right up :confused:

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