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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8329
Experience:  I am ASE Master Truck Certified.
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Speedo and Odom out.t a bump and it went dead. : No power to

Customer Question

Speedo and Odom out.hit a bump and it went dead.
JA: We'll do all we can to help. Tell me a bit more about what's going on so the Heavy Equipment Mechanic can help you best.
Customer: No power to speedo sensor. Where does power originate.
JA: Is there anything else important you think the Heavy Equipment Mechanic should know?
Customer: Have no power to speedo sensor.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Heavy Equipment Mechanic about your situation and then connect you two.
Submitted: 4 months ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 4 months ago.

Thanks for asking your question. I will try and help you out.

The two wire vehicle speed sensor does not have power going to it. It is a passive sensor. An AC signal is generated from the sensor interfacing with the chopper wheel in the transmission. Most often I find the problem a ailed sensor or a break or short in the wiring that connects to the sensor.

Please reply back if you need more help or have more questions. I am happy to assist.

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