Gobbles or gremlins....Its October ya know.... Thought I do not have a 60 and have a early model... Similar thing happened to me. I called in ghost busters... after several hours of investigating and bunch of $$$ (there ectoplasma gun is expansive ya know)
they determined a short in one of the cable, they said the cable was expansive and will try to save me $$ and patched the cable and the ghost in the machine was no more... I will have to dig up exactly what was done, this was a while ago...
In your case if all the lights are going out then automagically come back on then I suspect a loose ground. Did the gauges/interior lights stop working too or just the exterior lights?
Last edited by CCIE; 10-10-2018 at 05:04 PM.