My truck will not start. When the ignition is turned to on the dash electronics come alive but when the ignition is turned to start the gauges including odometer die. The engine turns over but will not start. I have replaced the PCM relays and diode, still no luck. All fuses are ok. please help

 

Have you had the battery load tested? Are the battery terminals clean and tight?

 

Always start with checking the battery

 

Sounds like a dead battery or bead connection.

 

If the engine cranks at normal speed the battery is supplying sufficient power for the vehicle to run.