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need help security light

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Old Mar 19, 2011 | 10:18 PM
  #1  
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From: Mansfield
Year: 89
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Engine: 4.0 ho
Default need help security light

Ok I unhooked my batt today to swap trannys and now that the swap is done my security light is flashing and will not start just turns over.
HELP PLZ.
94 LIMITED
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Old Mar 19, 2011 | 11:28 PM
  #2  
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From: Oroville, CA
Year: 1995
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Engine: 4.0 with all of the noise and clatter
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I think if you lock and unlock the passenger side door with the key, it might reset the security system.
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Old Mar 20, 2011 | 08:06 AM
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yup, try the passenger side door, if that don't work, then try the hatch, then the drivers door.
hopefully one of those will reset it.
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Old Mar 20, 2011 | 08:18 AM
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From: Mansfield
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Ok the hatch worked but all it did was stop the lights from flashing. Still will not start its like its getting no fire. I can hear the fuel pump come on when the key is turned to start
I tried the pass door and driver door and nothing
Please help
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Old Mar 20, 2011 | 08:46 AM
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did you install and hook up the crank position sensor? make sure it's plugged in, if not, try unplugging and blowing in the plug, then plug it back in and try it.
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Old Mar 20, 2011 | 03:46 PM
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Yes all sensors hooked up it will turn over all day gets fuel but no fire It ran fine yesterday before the swap
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Old Mar 20, 2011 | 04:38 PM
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From: Mansfield
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I'm getting no power to the coil
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Old Mar 20, 2011 | 06:52 PM
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maybe the cam sensor, or the pick up coil??

did the crank sensor wire get pinched?
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Old Mar 20, 2011 | 07:22 PM
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I did find out that the crank sensor did get pinched so I took it out and fixed the wires still no power. The other thing I did notice is when the motor is cranking my oil pressure is low. Will this cause the pcm to kill power to the coil? And since the wires were pinched will that cause it to short out?
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Old Mar 20, 2011 | 08:07 PM
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i think the low oil pressure while cranking is normal, just as long as it climbs when it turns over.
so i don't think that's the problem. someone else may chime in here.
i think it has something to do with the crank sensor. i'd say buy a new one, but those usually aren't returnable. maybe grab one or two from a junk yard.
you can also check the voltage to the crank sensor and coil to see if it's normal.

maybe try unhooking the battery for 15 minutes to see if it clears any codes.
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Old Mar 20, 2011 | 08:53 PM
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It does climb while cranking. I have no voltage to the coil. I double checked all fuses and relays. Its starting to get frustrating. It ran just fine before the swap
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Old Mar 20, 2011 | 09:25 PM
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Did you tight the battery connector? This happen me to me this morning I got the security lights flashing but didnt turn over and i check all locks and unlock the driver door with the key.
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Old Mar 20, 2011 | 09:26 PM
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Yes batt connectors are tight and batt is fully charged.
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Old Mar 20, 2011 | 09:30 PM
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if the cps wires where pinched and grounded out you could of fried the ecu... if you can open the ecu see if there was any magic smoke and burnt circuits
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Old Mar 20, 2011 | 10:11 PM
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If the ecu was fried wouldn't I have lost power to pretty much eberything in the engine compartment? I am going to replace the cps and see what happens I think it mite have shorted out when I got pinched
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