They should be on separate circuits. Most likely someone messed with the wiring. You will have to follow it.
Thanks, I will try that.
Here's what happens: slowly going down the road at 1400 rpm, blowing hot air. Revving it up to 1700rpm, in a matter of 10 seconds heat transitions...
I have a 2016 Cascadia with DD15. Shows high soot level. Started parked regen. DOC and DPF temperature won't go above 385*C (if I am not mistaken...
The driver was at another shop in TN few days ago. Went there to flash his tranny ECU (won't go in gear). They also tried to charge him 5k to...
I have a 2016 Pete with MX-13 with the following codes: CECU3 with Chassis Node Aftertreatment system operator inducement severity message error...
A driver complained to me that his truck (07 Volvo VN Cummins) blows hot air as soon as he gets on the highway. I replaced the HVAC control panel,...