How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Daniel Wilson Your Own Question
Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4380
Experience:  Owner at DJ Wilson
65405794
Type Your Medium and Heavy Trucks Question Here...
Daniel Wilson is online now
A new question is answered every 9 seconds

Having headlight problems 2012 t800 one rt low beam works

Customer Question

Having headlight problems 2012 t800 one rt low beam works left hi both light on hi beam low beam lamps circuit failure on dash have cked all chassis node fuses in cab and under hood verified all lamps are good even swapped node box under day cab
Submitted: 10 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 10 months ago.

Hi Loras my name is***** will try to help.

Exterior Lighting Circuit Limits

The multifunction turn signal stalk communicates to the CECU inside the cab which sends information to the Chassis

Node over the F-CAN bus. The Chassis Node then activates the load requested, drawing power from the chassis PDC.

The

Chassis

Node

is

designed

to

operate

within

specific

current

limits

for

Headlamps

Fog lamps

Vehicle stop/turn signal lamps

Trailer turn/vehicle forward side facing turn signal lamps

Back Up Alarm

Windshield Washer Pump

If the current limits for any of these circuits are exceeded, the Chassis Node will default to a protection mode, causing the

lamps

to

not

function

properly

but

still

providing

sufficient

lighting

for

safe

operation

of

the

vehicle.

See

TABLE

6-3

for

load

limits.

Expert:  Daniel Wilson replied 10 months ago.

I cant post the charts. Click this link and see PDF 253

Troubleshooting

Related Medium and Heavy Trucks Questions