help help help!!!!!!
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Junior Member
Joined: Dec 2009
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help help help!!!!!!
well i am new to this forum. and i have been reading as a gust to the problem i am having with my 1997 f150 5.4L 4x4 ..now the truck has the electronic shift on the dash.. when i switch it into 4hi or 4Lo the light on the dash does not show it is engaged.. the switch on the dash does have power going to it.. now i replaced the motor going into the transfer case.. and that didn't work the light still don't come on when switch from hi to low... i tried the four wheel drive thinking the bulb was out but still don't work brought it to my buddy he is a mechanic he said it could be the GEM module.. does this sound right or is there something we are missing that we should check.. thanks guys for all the in put
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Joined: Jun 2002
Posts: 10,511
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From: Under the flightpath of old ORD 22R
By the light on the dash, you mean the 4x4 ( and Low Range ) indicators on the cluster ?
Which pins did you check on the switch for power?
Think the only ones that should have 12 V are the illumination ones, when the parking lamps or headlamps are on.
The other 2 are for a resistance value from the switch to the GEM, which would have a lower voltage on them. This would be checking Dark blue to Dark Blue.
Not sure what you mean by "replaced the motor going into the transfer case" ?
Is this the shift motor in the transfer case that you are talking about ?
Did you check all 3 fuses for power on both sides ?
JMC usually posts this as the start of the diagnoses process:
If you do this, what are the results ? Need to know which way to look.
Here is a thread where the vac solenoids were the problem ( not sure what his result would have been on the initial test, guessing it would not turn by his solution ) :
https://www.f150online.com/forums/el...-problems.html
Here is another thread, where the member cut a wire accidentally for the transfer case shift motor ( would have been diagnosed quick with JMC's test where to go ) :
https://www.f150online.com/forums/el...-engaging.html
Which pins did you check on the switch for power?
Think the only ones that should have 12 V are the illumination ones, when the parking lamps or headlamps are on.
The other 2 are for a resistance value from the switch to the GEM, which would have a lower voltage on them. This would be checking Dark blue to Dark Blue.
Not sure what you mean by "replaced the motor going into the transfer case" ?
Is this the shift motor in the transfer case that you are talking about ?
Did you check all 3 fuses for power on both sides ?
JMC usually posts this as the start of the diagnoses process:
Lift and support the front of the truck so the front wheels are off the ground.
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.
Key on, engage 4x4 and try to turn the front drive shaft.
If it turns it is a problem with the transfer case.
If it doesn't it is a front axle engagement problem.
Here is a thread where the vac solenoids were the problem ( not sure what his result would have been on the initial test, guessing it would not turn by his solution ) :
https://www.f150online.com/forums/el...-problems.html
Here is another thread, where the member cut a wire accidentally for the transfer case shift motor ( would have been diagnosed quick with JMC's test where to go ) :
https://www.f150online.com/forums/el...-engaging.html
