Where does battery power go on a Silverado?
Where does battery power go on a Silverado?
Battery power runs from the battery to the B terminal on the starter motor. Battery voltage also runs through the 175 amp fuse to the starter relay terminal #30 in the underhood fuse box. Terminal #30 is the input power to one relay contact.
What causes Silverado to have intermittent no crank?
I’ll be honest with you, finding the cause of a Silverado intermittent no crank condition is no fun. It’s a complicate these that involves multiple switches and three computers. All the signals have to line up before the Electronic Control Module (ECM) will ground the starter relay.
Why does my GM car say no start no crank?
How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.
Where is the starter relay on a Silverado?
Battery voltage also runs through the 175 amp fuse to the starter relay terminal #30 in the underhood fuse box. Terminal #30 is the input power to one relay contact. When the ECM wants to initiate Silverado starter crank operation, it supplies power to the starter relay control coil in the underhood fuse box on terminal #86.
Why is my Chevy Silverado not cranking over?
Since you have voltage on the crank fuse while in crank position, we know the ignition switch is good. The pcm supplies the ground to the starter relay to turn on the starter. It is possible if the wiring is good, there is a problem with the pcm.
What should I do if my Chevy Silverado wont start?
Connect a 30-amp fused jumper between the battery positive voltage circuit of the starter relay switch circuit and the supply voltage circuit of the starter solenoid. Does the engine crank?
How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.
How can I tell if my Chevy Silverado is a PCM?
Without a GM tech two scan tool, there is no way to verify it is sending out a crank signal. However, if you verify all wiring is good and there are no open circuits, then we will know it is the pcm. You can check to see if the yellow/black wire is grounded at the starter relay.
