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roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 6176
Experience:  Shop Froeman for Freightliner Trucks
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Got 2012 388 pete faut came and they said it was def heater,

Customer Question

hi, got 2012 388 pete faut came and they said it was def heater , does it have a fuse that could have blown
JA: What's the make/model/year of your truck? Engine type?
Customer: pete(###) ###-####isx 15 cummins
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: its still on the road, just wondered if it would a fuse to check, it cut back his power
JA: Anything else you want the truck mechanic to know before I connect you?
Customer: thats it
Submitted: 9 months ago.
Category: Medium and Heavy Trucks
Expert:  roybelding replied 9 months ago.

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.


Expert:  roybelding replied 9 months ago.

ok, what is the engine serial number and the code???


Customer: replied 9 months ago.
roy, i only have a vin number,# 1xp-WP49X-8CD151377 the truck is on the road, he stopped got the oil changed and to read the code at a TA truck stop, i think it was 3351 derate emission, anyway the TA said it was a def heater problem, just wanted to know if i can have him check a fuse or if you think there is anything he can do his self
Expert:  roybelding replied 9 months ago.

there are several heaters for the def system. doubt it is a fuse. possible that a wire breaks at the connector on either side of the heater line. tell him to follow the lines from the def pump out to the doser injector for the def and inspect harness carefully.


Customer: replied 9 months ago.
it was working fine when parked for his break, but it was real cold last night, when he started it up this morning it got the fault, does it have fuse ill have him check it to
Expert:  roybelding replied 9 months ago.

as I stated, no. there are not individual fuses for the heaters.

Customer: replied 9 months ago.
that circuit is not protected by a fuse no where,
Expert:  roybelding replied 9 months ago.

yes, but it would fail all the heaters not just one. you said it had a heater failure. did all 3 fail??

you can have him check all the fuses with a test light or volt meter to confirm but there is a reason the fuse blew if in fact it did. I think you have a heater line issue with a wire broken which is more common


Customer: replied 9 months ago.
Expert:  roybelding replied 9 months ago.

your welcome


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