No power to crank and cam sensor

1996 CHEVROLET S-10
67,000 MILES
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SPEEDY8305
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when tried to start the vehicle i got no spark after testing all sensors and coil packs i found no power to crank and cam sensors tested pcm plug found power to some wires tested ground at plug found other wires were ground. which wires should be power and which should be ground?
Oct 9, 2011 at 6:05 PM
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JDL
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At the cam sensor, pink wire is ignition feed, comes from engine fuse 5-- 20 amp in fuse box. Circuit goes hot when you turn on the key. Use a voltage tester at the fuse, with key on, anything?

You may have to check feed to and from ignition switch, Including the ignition switch.
Oct 9, 2011 at 6:19 PM
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SPEEDY8305
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i checked all fuses got good voltage have good ground to cam and crank plug but have no power to either plug tested the pcm plug couldnt which socket in the plug has to have power at it
Oct 9, 2011 at 6:57 PM
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JDL
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What is litre size of engine and vin? I looked at 4.3 vinW. Check splice 123, wiring harness near distributor. Should be same color wire already mentioned.
Oct 9, 2011 at 7:20 PM
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SPEEDY8305
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im sorry its a 2.2 4 cyl no distributer only coil packs and they all checked out good, all new wires and plugs got power to pcm plug but no power to cam and crank sensor unless i jump the power from the battery buit still get no fire
Oct 9, 2011 at 8:18 PM
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SPEEDY8305
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also plugged in scan tool vechicle passed with no codes but all dash light(ses, airbag, check guages, battery and abs lights all on recently changed the ecm as well if that helps any
Oct 9, 2011 at 8:22 PM
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SPEEDY8305
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its a 2.2l the vin is i
1gccs1442t8212298
Oct 9, 2011 at 8:38 PM
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JDL
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That voltage comes from pcm. Check power and grounds in the diagram.
A new pcm may need to be programed.
Oct 9, 2011 at 8:45 PM
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JDL
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Note cam/crank sensor power.
Oct 9, 2011 at 8:49 PM
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SPEEDY8305
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is that schem for the pcm or the ecu?
Oct 9, 2011 at 8:53 PM
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SPEEDY8305
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i located the cam and crank sensor wire and removed a piece of insulation and found no power to the wire whether key was on or off
Oct 9, 2011 at 8:56 PM
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JDL
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What ever you want to call it. You only got one engine computer.
Oct 9, 2011 at 8:58 PM
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SPEEDY8305
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on my truck i have a ecu under the hood and a pcm inside the car
Oct 9, 2011 at 9:05 PM
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JDL
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My database didn't show that. I'll double check. Sorry if the info was wrong.
Oct 9, 2011 at 9:16 PM
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SPEEDY8305
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its ok any help is good help my pcm is located under the kick panel in the vehicle i got power to the pcm and when i try to crank the truck with a voltage tester in a port of the plug i have a flickering light which tells me that there is a signal of output could the pcm be bad and not sending the signal?
Oct 9, 2011 at 9:26 PM
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JDL
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I looked through two different databases, wiring and component location, only found pcm, under the hood. I don't know what to tell you?
Oct 9, 2011 at 9:29 PM
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SPEEDY8305
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on a 1996 chevy s-10 4 cyl 2.2l I have a engine control module and a powertrain control module thats weird that you cannot find it
Oct 9, 2011 at 9:36 PM
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JDL
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There does show to be a derm behind right kick panel. Energy reserve module, I wouldn't fool with that because of airbags. I can only tell you what my database shows.
Oct 9, 2011 at 9:37 PM
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SPEEDY8305
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i must apologize the part is called a Engine Control Module
Oct 9, 2011 at 10:07 PM
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SPEEDY8305
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my vehicle has a pcm and a ecu according to alldata I located the the pcm under the kick panel on the passenger side and the ecu is under the hood it says that the pcm may be defective
Oct 10, 2011 at 5:38 AM
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JDL
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Sorry, I don't have access to alldata. I have mitchel and motors database. It seems all databases are not created equal.
Oct 10, 2011 at 2:17 PM
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SPEEDY8305
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yes lol my pcm is a lil silver looking computer box inside the kick panel and my ecm or ecu is gray under the hood
Oct 10, 2011 at 3:35 PM
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JDL
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I believe you, if my database doesn't show it, not much I can do?
Oct 15, 2011 at 11:22 PM
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SPEEDY8305
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hey i got a new pcm but i now get a p0335 and a p0342 changed crank sensor and cam sensor
Oct 16, 2011 at 1:00 AM
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JDL
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Any driveability issues? Check ref voltage--ground--signal. You may need to check wiring circuits. Other than that, I don't know what else to tell you?
Oct 16, 2011 at 3:21 PM
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SPEEDY8305
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no power to crank sensor wire also checked with wire unplugged from pcm still no power its a yellow wire any ideas when i say no power i mean at either end of the wire
Oct 16, 2011 at 5:25 PM
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JDL
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The yellow wire is signal from crank sensor to pcm. The other two wires are ref voltage and ground. The cam and crank sensors share ref voltage and ground.
Oct 16, 2011 at 5:47 PM
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SPEEDY8305
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ok on my vehicle the yellow wire is the single wire in the 3wire plug and the ground and signal wire is next to each other
Oct 16, 2011 at 7:12 PM
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JDL
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You can see A--B--D in my diagram, that's all I have. The signal wire is not shared with the other sensor.
Oct 16, 2011 at 7:23 PM
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SPEEDY8305
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all i see in your diagram you sent me is a-b-c no d
Oct 16, 2011 at 7:28 PM
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JDL
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I hit the wrong key. Have a good day.
Oct 16, 2011 at 8:38 PM