03 F150 FX4 5.4
It's been about 6 months now since my "over head" temperature and compass readout stopped working. I used a voltage meter to check the connections on the wiring and found no bad connections. Hence, I started googling to see if other people had this issue. What i found: In most cases after a few years or rattling in the cab the small wires and terminals connected to the resistors and motherboard can come loose.
Here's a sort of do it yourself to check and fix a loose resistor of terminal clip.
Flat head screwdriver(for prying) or other pry tool
T15 torq bit
Soldering iron and solder
Their are 2 clips and 1 screw that hold the flatform to the roof of the cab. Remove the one black screw next to the windshield first. See pic below;
After that screw is removed, move to the back of the platform and gently pry/pull until each clip(on both sides) comes loose;
Step 2: Once the screw and 2 clips are unattached from the roof, the only thing left to unhooks is the wireharness.
This harness has a push in release on the right side to unattach it. Seen in the pic below
Step 3: Once you have the entire grey platform down you will see 4 torq screws holding the LED and motherboard. Use a T15 torq bit to unscrew these.
Note: after you remove the 4 torq scres, their is a slide in clip on one end up need to pull out before removing
Step 4: Once you have the LED setup unscrewed from the grey platform, remove it and notice 4 push in tabs that hold the casing together.
Slightly pull each tab out to open on casing.
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