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Hi, my name is ***** ***** is either caused by a bad door switch, or the switch on the dash is moved over to the dome light position, have you checked the switch yet?
It shows that all 4 doors are open on the dash???
Ok, the B1318 is a low voltage code, and can cause different modules to malfunction, have you checked the voltage at the battery when its running, and also when the engine is off?
how low is it with the engine off? If it drops below 10.5 volts, then this code will set, have you load tested the battery?
I would first load teat the battery, if its shows good, then suspect the GEM is bad, generic electric module, the GEm controls the dome lights, and if bad, can set both of these codes,Tim
it wont be a switch problem, if all 4 doors show open, its either going to be a bad battery, or the GEM is bad,Tim
did you load test the battery??
no i don't have a way to do that
younwill have to do that first, most parts houses like autozone, and Oriellys will do that for free, if the battery checks out good, then its going to be a bad GEM,Tim
Let me know, if the battery checks good, then you will need a GEM,Tim
Then you most likely hav a bad GEM, as the GEM also controls the locks,Tim
Not eally, you can check the inputs to the GEM from the door switches, But I seriously doubt all 4 switches are bad, and that would not effect the door locks, the GEM is the only common component in this, if it were a bad instrument cluster, that would also not effect the door locks, nor would it keep the dome light on,Tim
You will need a scanner to communicate with the GEM, to manually switch on/off the dome light and to read the inputs from the door switches,Tim