No Bus on gauge... ASD Relay Buzzing... No start. Help. - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 04-27-2010, 06:31 PM   #1 (permalink)
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No Bus on gauge... ASD Relay Buzzing... No start. Help.

Ok, ive tried to search for this, figured it might be common. But I havnt found anything to really help.

99 Cherokee 4.0 w/ automatic if it matters.

So Ive been cutting up the cherokee and moving a lot of things around. Everything always worked fine. One day the fuel pump wouldnt come on, well i checked it hardwired and it worked so.... I just took it out of the loop and ran it off its own switch. Jeep ran fine, I took it for a ride(it was raining, if it makes a difference) and still ran fine. Next day I try to drive it and I get a No Bus where the odometer usually is, and the ASD relay is making a crazy Buzzzing. Thought it was the relay, but my relay works elsewheres, and any relay i put in makes the same noise. I have gauge lights, and power to everything else. Just absolutelly nothing when i try to crank it over. Doesnt fire or anything. Is there a way to get rid of the ASD system? or Does this have something to do with me hardwiring my fuelpump? Or did i just get something wet and short circuit something??? any hints or experiences would be great, this is a trail only rig and all i need it to do is run.

Last edited by Randeezy868; 04-27-2010 at 06:31 PM.
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Old 04-27-2010, 07:20 PM   #2 (permalink)
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double check your fuses, and post in the correct section next time.
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Old 04-27-2010, 08:43 PM   #3 (permalink)
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moved.
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Old 04-28-2010, 09:51 AM   #4 (permalink)
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Had the same issue with my Durango. Seeing as they are both chrysler check your computer next time it wont start. With the key on, wiggle the center conector and listen for relays to click. The mainboard on the things will crack and you loose connection.
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Old 04-28-2010, 06:21 PM   #5 (permalink)
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YMMV, but when mine did that, it was the crank position sensor and computer. CPS went bad and fried the computer. I swapped the computer first and the bad CPS fried it immediately. Then I changed the CPS and computer and worked fine. CPS cost around $80 and junkyard computers $50-100.
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Old 04-28-2010, 09:04 PM   #6 (permalink)
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ok. ill check on those things and get back with ya. thanks.
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