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03 Ford Taurus dome light stays on with all the door shut it

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is a wagon...
03 Ford Taurus dome light stays on with all the door shut it is a wagon
Submitted: 2 years ago.Category: Ford
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Answered in 54 minutes by:
9/14/2015
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Ford
Satisfied Customers: 16,051
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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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?

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Customer reply replied 2 years ago
No I made sure switch was off it does show 4 doors open on dash
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

It shows that all 4 doors are open on the dash???

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Customer reply replied 2 years ago
it does also code b1790 and b1318
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

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?

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Customer reply replied 2 years ago
Battery is a little low but running is 14.2 battery low because of dome light staying on but it's been running 15 min and I had changed starter on car and it didn't need to be jump
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

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?

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Customer reply replied 2 years ago
No only by cranking with headlights on
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

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

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Customer reply replied 2 years ago
Ok
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

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

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Customer reply replied 2 years ago
OK one thing that did happen when I disconnected the battery or the starter and put everything back together a light was off and then come back on till I open the door and it stayed on after that OK one thing that did happen when I disconnected the battery or the starter and put everything back together a light was off and then come back on till I open the door and it stayed on after that
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

did you load test the battery??

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Customer reply replied 2 years ago

no i don't have a way to do that

Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

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

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Customer reply replied 2 years ago
Checking that today will be in touch
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

Let me know, if the battery checks good, then you will need a GEM,Tim

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Customer reply replied 2 years ago
Waiting on friend getting battery tested
Customer reply replied 2 years ago
They finaly got it checked battery is fine the previous owner said that a year ago the passenger door lock clicked and then it stopped and then some light never came on after it quit clicking but now it is staying on all the time and dash light is on for door open shows all 4 doors
Customer reply replied 2 years ago

hello Tim

Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

Then you most likely hav a bad GEM, as the GEM also controls the locks,Tim

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Customer reply replied 2 years ago

any testing

Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

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

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Customer reply replied 2 years ago
Can you tell me how to test that module
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

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

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Customer reply replied 2 years ago
I have a access to a Snapon solus edge will that work
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Tim Mohr
Tim Mohr
Tim Mohr, ASE MASTER TECH
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Satisfied Customers: 16,051
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