bought this jeep for $300 with plethora of electrical issues. it's been sitting for a couple of years. after a year of fiddling with it, I replaced the pcm and it started right up. here's some quick history
2007 jeep liberty 3.7L 2WD limited, 114K, with a fair share of rodent droppings under the carpet
before pcm replacement:
>throttlebody was ruptured due to misfire. replaced. inspected ign wires. new spark plugs and full tune up.
>alternator shorted, POS+ wire to alternator shorted, replaced both + new battery
>Vehicle now turns on for 1 second then turns off (security light on). new key from dealer/programmed. no dice.
>Replaced PCM. car turns on and is drivable at highway speeds.
After PCM replacement:
>checked All engine compartment grounds for continuity. all good
>p0032, o2 sensor heater circuit high. can't pass smog (maybe for another article)
>p0443 EVAP System Purge Control Valve A Circuit, replaced purge valve assembly, noticed purge valve line from gas tank ruptured, replaced as well.
>blower motor/ac control switch dead
>reverse lights dead
>turn signals dead
>Noticed Fuses 24,25,38,39 on BCM were not getting power. refered to wiring diagram.
there are two pink/yellow wires from the ignition switch that get power when the key is in Run/Start.
one pink/yellow wire supplies the wiper/motor, which works. just to make sure I probed the wire and it does have current flow.
the other pink/yellow wire is NOT getting power when ignition switch is Run/Start.
this wire goes from the ignition switch (appears original) straight to the fuse box on left side of dash, which powers Fuses 24,25,38,39 and the fuses for the air bags (srs light is on).
first thing I figured was if the wire isn't getting power from the switch, the wire or switch may be bad. the wire is okay.
to further check, I connected alligator clips to the dead pink/yellow wire on one end, and 12v on the other. Everything started working. the fuses all got power, reverse lights work, turn signals work, SRS light is off. so the wiring appears to be fine? I go ahead and get a new ignition switch to see if it will start supplying the pink/yellow wire power...but it didn't. the new switch didn't change anything. I can just connect the 12v supply but I'm genuinely curious what it is I'm missing. could it be the pin/actuator? also could this in any way be related to my o2 sensor heater issues?
Thanks for any help.
2007 jeep liberty 3.7L 2WD limited, 114K, with a fair share of rodent droppings under the carpet
before pcm replacement:
>throttlebody was ruptured due to misfire. replaced. inspected ign wires. new spark plugs and full tune up.
>alternator shorted, POS+ wire to alternator shorted, replaced both + new battery
>Vehicle now turns on for 1 second then turns off (security light on). new key from dealer/programmed. no dice.
>Replaced PCM. car turns on and is drivable at highway speeds.
After PCM replacement:
>checked All engine compartment grounds for continuity. all good
>p0032, o2 sensor heater circuit high. can't pass smog (maybe for another article)
>p0443 EVAP System Purge Control Valve A Circuit, replaced purge valve assembly, noticed purge valve line from gas tank ruptured, replaced as well.
>blower motor/ac control switch dead
>reverse lights dead
>turn signals dead
>Noticed Fuses 24,25,38,39 on BCM were not getting power. refered to wiring diagram.
there are two pink/yellow wires from the ignition switch that get power when the key is in Run/Start.
one pink/yellow wire supplies the wiper/motor, which works. just to make sure I probed the wire and it does have current flow.
the other pink/yellow wire is NOT getting power when ignition switch is Run/Start.
this wire goes from the ignition switch (appears original) straight to the fuse box on left side of dash, which powers Fuses 24,25,38,39 and the fuses for the air bags (srs light is on).
first thing I figured was if the wire isn't getting power from the switch, the wire or switch may be bad. the wire is okay.
to further check, I connected alligator clips to the dead pink/yellow wire on one end, and 12v on the other. Everything started working. the fuses all got power, reverse lights work, turn signals work, SRS light is off. so the wiring appears to be fine? I go ahead and get a new ignition switch to see if it will start supplying the pink/yellow wire power...but it didn't. the new switch didn't change anything. I can just connect the 12v supply but I'm genuinely curious what it is I'm missing. could it be the pin/actuator? also could this in any way be related to my o2 sensor heater issues?
Thanks for any help.