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89 MJ with security issues??


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I have a 89 MJ with a 91 Cherokee motor 4.0 The guy also put the cherokee doors on it,power windows and locks. I'm having problems with the security system now. I parked the jeep one night, the next morning it would only start for a sec. then die. I can keep it running on starting fluid. So i changed the fuel pump. Same problem. SO if anybody has any ideas on how to bypass this system I'm listening. Or if you think its another problem please tell me.

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The fuel pressure is holding a 31-40 all the time. I know it isn't losing spark. I jumped the 2 wires going to the ballast resistor and i does the same thing. What about a crank position sensor?

I am pretty sure my MJ has a security system cause if you disconnect the battery and re hook it the lights start blinking on there own. I think the PO installed it so the power windows and locks will work.

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The fuel pressure is holding a 31-40 all the time. I know it isn't losing spark. I jumped the 2 wires going to the ballast resistor and i does the same thing. What about a crank position sensor?

I am pretty sure my MJ has a security system cause if you disconnect the battery and re hook it the lights start blinking on there own. I think the PO installed it so the power windows and locks will work.

 

Yeap, that sounds like the factory security system on the XJ's. When you unhook the battery and hook it back up, while the lights are flashing, lock and unlock the drivers door with the key and it should reset the system. If that doesn't work, do the same process to the passenger side door. The factory system only shuts off the fuel flow so yes you could start it and keep it running with another source of fuel.

 

:cheers:

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lock and unlock the drivers door with the key and it should reset the system. If that doesn't work, do the same process to the passenger side door.]

 

The drivers door has that door pin broke off, i got a couple of them from a junk yard and replaced it. And i did try to lock and unlock the passenger door. I think this all happen cause my wife accidentally hit the lock button on the door the other night. I would like to eliminate this whole system if passable. I leave my doors unlocked and keys in the truck at all times anyway.

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I have done the green and orange wire thing, ran it to ground. If i disconnect my battery i can get the alarm to go off, then ground that green wire, and it shuts the alarm off. Or at least the lights quit blinking. But the truck still starts runs for a sec or 2 and dies. So is it really the alarm or do i have a sensor problem now?

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