How do you handle a no-crank/no-start condition on a 1996 4.0L Jeep Cherokee? Go to the latest diagnostic case study featured in the free Wells Tech video training series from Wells Vehicle Electronics. Wells training videos are available 24/7 via the company’s YouTube channel as well as the “Wells Tech” link at

National Institute for Automotive Service Excellence (ASE) Master Technician Jim Gehl hosts this six-minute program detailing diagnosis of a well-hidden circuit issue on a Jeep equipped with a four-pin relay. The video examines each step in the repair and includes vital information regarding relay design and operation.

“This video can help technicians save a lot of time and aggravation when working on any vehicle with a similar starting system layout,” says Mark Hicks, technical services manager, Wells. “In this particular case, the customer had already installed a new starter and ignition switch and was losing patience. Each of our diagnostic case studies takes a real-world approach to the challenges facing today’s technicians and shop owners.”

The Wells video library includes in-depth training segments covering a broad range of drivability and related topics. The videos can be accessed by searching for “Wells Vehicle Electronics” on