Heater Grid Question

[6BT-Dakota]

Hey guys I have a question about my 03. When I start my truck and drive it when I come to a stop or when it is sitting at an idle the lights seem to dim every 10-15 seconds for about 1 second is that the heater grids cycling on and off and is that a typical thing ?

 

[AllianceDiesel]

yep thats exactly what it is, nothing to be concerned about

 

[rbattelle]

Hey guys I have a question about my 03. When I start my truck and drive it when I come to a stop or when it is sitting at an idle the lights seem to dim every 10-15 seconds for about 1 second is that the heater grids cycling on and off and is that a typical thing ?

They should shut off after you exceed ~20 mph.



Ryan

 

[AllianceDiesel]

It has nothing to do with speed,



PRE-HEAT TIME WITH INTAKE TEMP AT: PRE-HEAT TIME WITH BARO AT:

19. 99 IN. HG 23. 00 IN. HG. 25. 00 IN. HG. 26. 99 IN. HG. 29. 00 IN. HG.

-40. 09° F 30. 0 seconds 30. 0 seconds 30. 0 seconds 30. 0 seconds 30. 0 seconds

-20. 00° F 30. 0 seconds 30. 0 seconds 30. 0 seconds 30. 0 seconds 30. 0 seconds

0. 00° F 30. 0 seconds 30. 0 seconds 30. 0 seconds 30. 0 seconds 30. 0 seconds

0. 09° F 15. 0 seconds 15. 0 seconds 15. 0 seconds 15. 0 seconds 15. 0 seconds

15. 00° F 15. 0 seconds 15. 0 seconds 15. 0 seconds 15. 0 seconds 15. 0 seconds

15. 09° F 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds

32. 00° F 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds

50. 00° F 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds

66. 00° F 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds 10. 0 seconds

66. 09° F 00. 0 seconds 00. 0 seconds 00. 0 seconds 00. 0 seconds 00. 0 seconds

 

[rbattelle]

It has nothing to do with speed,

I respectfully disagree. In my opinion, the ECM is programmed to cancel a postheat function when the VSS indicates >=~20 mph.

Ryan

 

[abrankod]

Agreed. The post-heat on my 2007 does indeed cancel if you go above 20MPH.

-Dan

 

[AllianceDiesel]

I just realized I gave you the wait to start light, I will find the heater times, I know its on there,and Im pretty sure it has nothing to do with speed but I will double check, I havn't been able to find anything on dealerconnect yet.

 

[6BT-Dakota]

It does not do it when im over 20 MPH

 

[DaveHess]

According to my Owners manual: The post heat goes for 150 seconds or until the vehicle reaches 20 mph at which time they shut off.