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1999 Dodge ram 1500,”No Bus” flashing and Abs light, check engine, airbag light

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Old 07-21-2024, 04:03 PM
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Default 99 dodge1500,”No Bus” and Abs light, check engine, airbag light

Cant seem to figure out whats wrong with my truck, the check engine light is p0500 ive replaced the sensor on the rear axle and transmission,ohms read fine at the axle connector, Ive traced cables, im not getting any drops throughout, im at a loss. I just finished looking into the fuse box under the hood for corrosion





 

Last edited by Woopty23; 07-21-2024 at 07:41 PM. Reason: Title to long
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Old 07-21-2024, 07:57 PM
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Vehicle speed sensor. On yours, that's the sensor on the rear axle. Unplug it, does the no bus go away?
 
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Old 07-21-2024, 09:52 PM
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Originally Posted by HeyYou
Vehicle speed sensor. On yours, that's the sensor on the rear axle. Unplug it, does the no bus go away?
no, it stays the same.
 
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Old 07-22-2024, 07:48 AM
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You have something else on the 5 volt bus failing then. Start unplugging sensors, see if one of 'em gets the dash back.
 
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Old 07-24-2024, 02:37 PM
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Originally Posted by HeyYou
You have something else on the 5 volt bus failing then. Start unplugging sensors, see if one of 'em gets the dash back.
I disconnected the Vss sensor, transmission tail shaft sensor, and the abs module. The same lights are still on. I might also mention I replaced all 3 sensors, what would u recommend I disconnect next?
 

Last edited by Woopty23; 07-24-2024 at 02:40 PM. Reason: Need to add something
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Old 07-24-2024, 04:12 PM
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Anything on the 5 volt bus. Which is also most of the engine sensors.
 
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Old 07-24-2024, 05:34 PM
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[QUOTE=HeyYou;3591257]Anything on the 5 volt bus. Which is also most of the engine sensors.[/QUOTE
Is there anything i can do to rule out where i should start disconnecting?
 
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Old 07-24-2024, 06:45 PM
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Originally Posted by HeyYou
Anything on the 5 volt bus. Which is also most of the engine sensors.
update: I disconnected crankshaft sensor,MAP sensor, TPS sensor. Still the same issues.
 
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Old 07-24-2024, 09:22 PM
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Try front and rear O2 sensors as well.
 
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Old 07-25-2024, 12:33 AM
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Originally Posted by HeyYou
Try front and rear O2 sensors as well.
Thank you i will try that tomorrow, i also tested everything I disconnected with a multi meter and got 5v. Also when i drive around and look on my code reader the VSS will cut out and drop to 0 at times
 

Last edited by Woopty23; 07-25-2024 at 02:18 PM. Reason: Change


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