2007 6.0 my dash lights will flicker when the key is turned on and the truck wil crank but won't start, but when the lights stop flickering truck starts ..any ideas on how to fix the flickering dash light?

 

When you first Key On the injectors are cycling and the glow plugs light up, sounds electrical. How good are the batteries and you should start checking grounds.

Welcome to FTE. The guys will be along shortly who love electrical problems.

 

Look in your owners manual and find the relay that powers the lights. Sounds like it could be your PCM power relay. Swap with another relay and see what happens. Whenever I troubleshoot any electrical problem the first thing I look for is a relay. It is the weak link in any electrical circuit because it involves mechanical contacts that get burnt or pitted.


I normally swap my relays around every 6 months.


Ed