9900i dash/marker lights out

What is the location and description of the fuse that keeps blowing? What year is the truck?

 

Check if F3-C is tripped/blow. That is the third row from the left, third one down. This protects a few other circuits including F8-C.

 

If F3-C is getting hot but not tripped, where should he look next

 

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I'm having the same problem, take F3-c out and light work fine, just don't know it controls, need help!

 

F3-C is battery power to the "Cab and trailer lights relay". When you turn on the lights this relay is triggered and F3-C then powers more circuits. First, it powers tail lights to the trailer socket. Then it powers F8-C. After F8-C, it powers the dash, cab clearance lights. Breakers really shouldn't get hot. It may be hot due to a bad connection at the socket it plugs into. Check to make sure the plastic isn't melted. F3-C should be 30 amps. If only F3-C is hot but F8-C is normal, I would say the trailer socket or wiring is the problem. Check your trailer cord too.

 

Thanks, I changed F3-C and now it's normal temp, maybe that was the problem, if not I know where to start next, thanks again

 

Thanks, I replaced F3-C and now it's normal temp, maybe that solved the problem, if not I know where to look next, thanks again