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go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1131
Experience:  Technican with 20 years experience focused on engines and electrical.
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My 2015 Freightliner M2 has an alarm going off and the park

Customer Question

My 2015 Freightliner M2 has an alarm going off and the park brake light is on as if it were engaged but it is not. Seems to stop as we stop the truck but then starts right back up as we go.
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Submitted: 4 months ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 4 months ago.
Good morning
Do you have air or hydraulic brakes?
Customer: replied 4 months ago.
Customer: replied 4 months ago.
It seems to think the e-brake/park brake is engaged but it isn't.
Customer: replied 4 months ago.
I'm asking my driver for more info as I know this is a non cdl truck and doesn't have air brakes. I answered hydraulic prematurely but is there other options for this vehicle?
Customer: replied 4 months ago.
Seems to make sense that they are hydraulic then and to my driver
Expert:  go-west.. replied 4 months ago.
The park brake
Is it a yellow button on the dash or a foot brake like on a car
Customer: replied 4 months ago.
foot brake like on a car
Expert:  go-west.. replied 4 months ago.
The sender for the light is down by that peddle. It has a little metal tab that breaks. And I think that's what you have going on. Let me know how you do
Customer: replied 4 months ago.
Thanks. I will check it out when the truck gets back.
Expert:  go-west.. replied 4 months ago.
Customer: replied 4 months ago.
I can see the switch/sensor and the little metal tab is still attached so that doesn't seem to be the issue. I got freightliner to send the schematic but everything seems to be in place?
Expert:  go-west.. replied 4 months ago.
Manually toggle the switch up and down with your finger
Does the light stay on?

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