So I just completed the installation of my guage cluster after replacing all the backlight bulbs in it, start truck up and everything is working great. Then out of nowhere I get this beeping from under the dash. It beeps 5 times and then stops, then procedes to repeat the same process 5 times then it shuts off. I remember I plugged in everything. I also disconnected the battery for 5 minutes before working on the truck. Is there something I missed???

 

I get the same error beep. I assume the problem is when you take the visual warning away you get the audible. Fords way of making sure the issue is dealt with or its to just annoy us, lol...
I took the ABS bulb out and it started. If you remove a relay for Air Bag you get the same. These are just my experiences so don' take it to the bank.
Hope it helps...