After a suggestion of starting my own thread, I’ll repost here.
I hope maybe one of you guys can point me in the right direction. My 98, 4.0, AW4, had a dead battery, I jump started it the other day to move it up into the garage to replace the badly cracked APN header. Before I Started the header swap, I stuck the charger on it, turned the charger to high amp for engine start, it did not start. It cranks, but will not fire. The fuel gauge doesn’t register, the volt gauge reads nothing, the ASD relay and the fuel pump relay do not pull in. All fuses check good. I pulled a cover off a relay, stuck it in fuel pump slot, tripped it, fuel pump does run. I unplugged the CPS, the one on the fly wheel, it did not change anything. The CPS ohm’s open. I have unhooked all sensors. I have power to PCM. I have no 5V output. I cannot get the code scanner to connect to PCM. Where should I look next? Could I have fried the ECM, when I turned the charger to boost or when I ran it on a dead battery after I jump started it?
Thanks in advance for your help!
I hope maybe one of you guys can point me in the right direction. My 98, 4.0, AW4, had a dead battery, I jump started it the other day to move it up into the garage to replace the badly cracked APN header. Before I Started the header swap, I stuck the charger on it, turned the charger to high amp for engine start, it did not start. It cranks, but will not fire. The fuel gauge doesn’t register, the volt gauge reads nothing, the ASD relay and the fuel pump relay do not pull in. All fuses check good. I pulled a cover off a relay, stuck it in fuel pump slot, tripped it, fuel pump does run. I unplugged the CPS, the one on the fly wheel, it did not change anything. The CPS ohm’s open. I have unhooked all sensors. I have power to PCM. I have no 5V output. I cannot get the code scanner to connect to PCM. Where should I look next? Could I have fried the ECM, when I turned the charger to boost or when I ran it on a dead battery after I jump started it?
Thanks in advance for your help!