Truck won't start - Dodge Cummins Diesel Forum
94-98 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

 
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post #1 of 7 (permalink) Old 05-05-2016, 08:54 PM Thread Starter
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Truck won't start

Hello I have a 96 12v 5 speed the other day it wouldn't crank even with a jump so I pull started it to and from work got a starter in my way home put a new starter on it and it still won't crank I have 12 volts at starter I ran cables right to the starter and it won't crank even when you cross the posts I tried another new starter and the same issue and now it won't even pull start please help I'm out of ideas

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post #2 of 7 (permalink) Old 05-05-2016, 10:58 PM
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When you measured 12V at the starter, did you have the starter engaged? Where did you have the probes?


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post #3 of 7 (permalink) Old 05-05-2016, 11:00 PM Thread Starter
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I had positive on big starter post and negative on the starter case I thought maybe a bad ground
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post #4 of 7 (permalink) Old 05-05-2016, 11:17 PM Thread Starter
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I'm just confused the battery's are 6 months old it has a new starter I hook jumpers to another truck and try to bridge the starter with a screw driver and it won't even spin and now after pull starting it a few times to get to work it won't even start with a pull
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post #5 of 7 (permalink) Old 05-06-2016, 01:08 AM
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Turn the key to the "start" position while measuring the voltage at the starter like you did. What you describe sounds like a bad connection somewhere. In order to pull start the engine, the FSS must be in the up position.


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post #6 of 7 (permalink) Old 05-06-2016, 06:20 AM
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I agree, based on the limited input, you have a bad connection at the battery or one at least one end of the major cable to the starter or to the engine/chassis ground.

As cowboy303 says, tie-wrap your FSS into the up position for pull starting.

The easy way to determine where the high resistance is in the cable:
hook up a voltmeter, positive on the battery, negative on the starter large post, monitor it while cranking. It should read less than half a volt.

Then hook up negative lead to battery, touch positive lead to clean metal on the starter housing, and monitor while attempting to crank. Again it should read less than half a volt.

The high resistance connection, especially if it is a cable lug, will often get very hot when cranking.

More details are in the "starting" section of the free factory service manual that you can download at the top of this forum.

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post #7 of 7 (permalink) Old 05-06-2016, 06:43 AM Thread Starter
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Thank you I'll try that
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