Electtical

Asked by Nov 19, 2016 at 05:32 PM about the 1998 Jeep Grand Cherokee Laredo 4WD

Question type: General

I just replaced the coil pack and crank
sensor on my 98 jeep grand cherokee and I
still have no fire out of the coil pack..
However when you connect the ground to
the battery the asd fuse blows,, someone
had told me to check all the grounds on it
could someone please help me locate or
fond them thanks,

1 Answer

The ASD relay is used to connect the O2 sensors, the ignition coil, and the fuel injectors to power. The wires to one of these may have a short, or one of theses components or relays connected to that circuit may as well have a short. You can use a digital multi-meter to test the resistance between each pole of the relay and the corresponding Normally closed and normally open contacts for that pole Checking wiring for any shorts to ground is a very annoying task so I recommend starting with the easier things to check first. Always remember KISS (Keep it simple stupid) and work from easiest to hardest task. I had a 94 Cherokee that I couldn't get to fire up and after replacing coils, plugs and wires, distributor cabs, rotter button, crank sensor (twice), and hours and hours wasted as well. I dropped the transmission, cant remember why now, but anyways the damn flywheel was cracked and wasn't sending any signal to the crank sensor at all. So no fire either. That's all that I can think of at the moment but I'm sure there are probably few things that i have forgotten.

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