Fuse #15

[Iceman64]

Recently my truck has been being really week every morning when i go out to crank it. so i traced the problem to the #15 fuse. its the only one that was drawing power according to the amp meter. Have any of yall had this problem before or do yall know what on that fuse could be pullin the battres down?

[ianstew]

i dont have a diagram handy, but pull the fuse and see what doesnt work.

[jesilvas]

Your manual says it if you have it.
Fuse 15 in the cab or batt junc box?
In cab: Stop Lamp Switch (Logic): Generic Electronic Module (GEM), Powertrain Control Module (PCM), Four Wheel Anti-lock Brake System (4WABS) Module, Brake Shift Interlock, Cluster and PCM Keep Alive Memory
Batt junc box: Says not used.

[jesilvas]

Originally Posted by ianstew

i dont have a diagram handy, but pull the fuse and see what doesnt work.

Originally Posted by jesilvas

Your manual says it if you have it.
Fuse 15 in the cab or batt junc box?
In cab: Stop Lamp Switch (Logic): Generic Electronic Module (GEM), Powertrain Control Module (PCM), Four Wheel Anti-lock Brake System (4WABS) Module, Brake Shift Interlock, Cluster and PCM Keep Alive Memory
Batt junc box: Says not used.

Everything

[ianstew]

eww.....gem module. usually the culprit

[jesilvas]

That's what I was thinking but where the heck is that thing? I've never seen a pic, just that it's behind the fuse block or something.

[Iceman64]

Its the one in the cab. How in the world would i check all that?

[mgassel]

I remember that a while back ford was having issues with the abs motor or something with the abs continue running under the truck after the vehicle is shut off. That would cause a drain.

The only reason I remember that is because the person said that fuse deals with the abs.

[jesilvas]

Thought the ABS motor was at the front, kinda behind the driver headlight.

[NoRalPh]

Wait a min.....

The PCM & GEM are Supposed to be drawing power All the time. You would need to know how Much power it's consuming to know if it's your problem. And remember, when you first reconnect it the amount of "draw" from there will decrease slowly for about 1/2hr before reaching a stable point.

If you stopped when you got to #15, Keep Going, see if there's another circuit with a draw that's not supposed to be there (unlike #15)

The most likely culprits are the radio, alt, dash cluster.