I have a 1989 gmc sierra 1500 350 small block that ran good and all i did was change the plugs and wires turned her over and she started rough so i new the wires were wrong. sure enough two of them were not connected so i plugged her back up and went to start it and nothing at all. didnt turn over or make any sounds. all my lights and gauges work but nothing else motor wise. so i got a new starter put it in and still nothing. checked all my grounds and wires and they all match up. i even bypassed the neutral saftey switch by running a cable straight from the s terminal on the starter to the battery and only heard the starter turn over really slowly and again silence. please help me!!!!!!!!!! oh yeah i was able to turn the motor by hand with all plugs in pretty easily so throw the blown motor out the window too plus i am getting 12v down there from the main terminal on the starter.
Did you check your ground wire?If ground is good check to make sure your solenoid wire which is purple usually if it is broke if not get a test light and have someone turn motor over to crank position and check if power there if so more than likely ground problem.If solenoid has no power move to fuses under drivers dash..
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Then check to see if you have power on the s terminal side when cranking.And make sure your key is being turned all the way to crank position..If all checks out take a screw driver and jump the s terminal and hot cable side of starter and see if that rolls it over if so then theres a problem in the ignition side,
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my ground is good and im going right now to check the power to the s terminal but on the main power terminal there is power
i checked both the main and the s terminal and both have power
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