2000 jeep grand Cherokee current to PDC but not to Junction box

Asked by Dec 13, 2015 at 10:20 AM about the 2000 Jeep Cherokee Limited 4WD

Question type: Maintenance & Repair

2000 jeep grand Cherokee.My friend bought this used grand Cherokee and
it ran fine all the way home.  The vehicle was not started again because the
next morning water was on the floor boards. He is attempting to replace the
heater core and needed to remove the carpet too . He started by removing
the radio and other components on the dashboard. Most of the trim was
removed along the dashboard as well. The transmissions selector housing
was removed as well as the seats, driver and passenger and back seats.
The Manual says to straighten the tires so the steering column can be
removed once locked.  He turned the key and nothing happened. No click
or turning of the engine.  The horn would not work and the headlights
would not come on. We checked the battery and replaced it.  The ignition
still won't start and no horn or headlights.  Check the voltage between the
battery and the power distribution box and it was good.  Fuses and relays
were checked and replaced if needed.  Voltage is getting to the cavity.  
Check voltage at junction box and no power.  There is voltage to the
generator.  There is voltage to the starter.  At connector C102 there is
power at the terminals.  At connector C106 there is no power. That's about
as far as we got. Please... any help?

3 Answers

27,985

You removed the transmission selector housing - you probably removed the neutral safety switch too. (hence jeep wont start). You removed the dash and components, so how can the lights/horn work at that point? My suggestion is to make sure all wiring harness connectors are re-connected and take it from there.

Thanks for answering Ken. The NSS is intact and connected and the ground wire is connected at the floor board area of the shifter. So the connection problem would still allow the ignition to go to ACC... but it won't do that. The Dash isn't removed, just some trim around the steering column and the glove box. He needs the steering column out to get the dash out to get the Heater core out. The only things disconnected on /in the dash are the Radio, Cig lighter and the AC Heater controls accessible to be removed. All ignition connectors, fuses and whatever else, have not been disconnected or removed. There's no dash board lights, dome lights, vanity lights, chimes, door lights or for that matter the hood light is off too (no current to plug).I could understand the vehicle not starting but chimes or the horn not working because the radio and cig lighter are removed? The seats I could possibly see having some cause for not starting but still no horn? I don't have feed + B to the fuse box/ junction box.but I have feed +B at connector C102

27,985

Is there a body control module disconnected in the vicinity of the seats? It does seem from your description it's from something unplugged versus an actual fault. You should still be able to turn the key to ACC & ON to straighten the wheel, even without the power steering boost (or for that matter any electrical power) Your lack of power and your ignition lock problem may be two issues. To free the ignition lock and get it to turn to ACC or ON try some of the usual fixes: grab the steering wheel and twist it slightly back and forth to unbind the ignition lock cylinder, and make certain the shifter is in park, it may have gotten bumped when you removed the housing.

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