Another electrical issue... No inj buzz, no crank, no OBD
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Mountain Pass
Joined: Aug 2011
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Another electrical issue... No inj buzz, no crank, no OBD
I'm here again... I've been blessed with a handful of nasty Electrical issues lately. 2003 6.0 auto KR. Ign turns on, dash comes on like normal, windows & lights all work, vacumm pump works.. Thats it. Starter turns well if I hotwire it. Other then that she's dead. No buzz on inj when ign is on. OBD port has the power on blue/white wire but rest have none. Scanner says can't connect. Fuel pump doesn't run. Starter doesn't crank. All fuses have been checked. Checked with test light on all the engine related fuses and they all light up. Relays have all been switched around. Tried another used PCM to test. Unplugged fan, ebp, map, maf. My brain is going on overload trying to get all these electrical issues fixed. I much prefer a HPO leak or inj going bad, that I know how to tackle. I hate electrical. Thanks!!
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Joined: Nov 2012
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So part of your circuits have power and others do not.
By the way throw the test light away it will light with only one vlt but your equipment wont work.
Worst thing to use troubleshooting a computer controlled system.
By the way throw the test light away it will light with only one vlt but your equipment wont work.
Worst thing to use troubleshooting a computer controlled system.
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Mountain Pass
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Mountain Pass
Joined: Aug 2011
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they all have power.
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Mountain Pass
Joined: Aug 2011
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Next on the list is to check v ref.
Posting Guru
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Vref is a common circuit to all sensors and actuators. One bad spot in the circuit will affect all, even to a no start. The test of vref is long and involved.
The test procedure in the PCED maual takes a lot of time. You basically unplug all then test one at a time all the different tests. then move on to the next.
All I can say is happy hunting.
The test procedure in the PCED maual takes a lot of time. You basically unplug all then test one at a time all the different tests. then move on to the next.
All I can say is happy hunting.
Thread Starter
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Mountain Pass
Joined: Aug 2011
Posts: 199
Likes: 0
Vref is a common circuit to all sensors and actuators. One bad spot in the circuit will affect all, even to a no start. The test of vref is long and involved.
The test procedure in the PCED maual takes a lot of time. You basically unplug all then test one at a time all the different tests. then move on to the next.
All I can say is happy hunting.
The test procedure in the PCED maual takes a lot of time. You basically unplug all then test one at a time all the different tests. then move on to the next.
All I can say is happy hunting.
I checked fuses under dash with v meter and all that are related to engine function have 11.8v with key on. Double checked fusable links on pass side coming from batt and they all have 11.8v as well.