Troubleshooting no start on a semi truck.
I recommend getting the tools below
Diesel engine scanner. ://amzn.to/3Es3d5x
Battery tester. https://amzn.to/3EthFud
Tool kit. https://amzn.to/3SlJrhS
Fuse kit. https://amzn.to/3INCgM4
i may get a small commission for any referral purchase.