Symptoms indicates a power supply interruption and for such cases, the most likely cause would be the ignition switch, at end of key cylinder.

Has it been checked?

Check the ignition switch wire harness connectors for looseness and look out for signs of overheating.

Answered by KHLow2008 (expert)
40,318 answers provided

I was told it was checked ,it had been replaced 4 yrs ago , is it hard to change it again,any tricks on changing it sir ?

Response from nightworld1313
1 question asked

Electrical components are difficult to predict their lifespan so 4 years could be a rather long time.

Not too difficult to do and is a straight forward job.

IGNITION SWITCH
Removal & Installation
Disconnect negative battery cable. Remove steering column opening cover. Remove hood release handle and position aside. Remove parking brake release handle and set aside.

2. Remove steering column opening cover reinforcement. Disconnect ignition switch harness connector. Remove 2 ignition switch screws and ignition switch. To install, reverse removal procedure.

Answered by KHLow2008 (expert)
40,318 answers provided

Ok I just replaced the ignition switch ,didn't see any signs of heating. The truck is still shutting off at times ,powering down then powering back up as before. Any other advice sir? :-(

Response from nightworld1313
1 question asked

Picture of old switch

Response from nightworld1313
1 question asked

New switch

Response from nightworld1313
1 question asked

My dash lights go off,truck shuts off then switches back on . Then I can restart my truck . It dosen't do it all the time but in some cases all the time. Really crazy if I must say sir.

Response from nightworld1313
1 question asked

That is not the switch. It is the key cylinder.

Switch has wires attached to it located at other end of key cylinder.

Answered by KHLow2008 (expert)
40,318 answers provided