No tail or dash lights

I have a 2000 F-250SD V10 that has recently developed a problem.  I had a remote starter installed in it about 4 years ago and I think this point may be significant.  Recently, when I turn my headlamp switch on, my dash lights do not come on, my tailights do not come on and my stereo/compass lights do not dim. 

I first thought this a fuse, but then I walked up on my truck when my remote starter had control of it, and my dash lights are flashing every few seconds as well as my tailights.  I looked through all fuses, not just the ones that had anything to do with either lights, and I find them all in order. 

It looks like it might be a relay problem?  Could that be it.  There are only 5 relays listed in my owners manual and the listing is a little thin as I don't really know what they control, even after reading about them.  It seems likely that the relay that the remote starter uses to flash the lights, is working fine.  Could there be a problem or short with where this relay was installed?

I'm struggling here.  I live in a very remote area and nobody knows anyting about this stuff around here.  I had the starter installed in a bigger centre and can't get anywhere to get this fixed this winter.  The no dashlights is annoying, but the no tailights thing is dangerous.  Any help is greatly appreciated.