When a auto tech hears the statement “it only happens now and then” it makes their blood run cold. How do you repair a problem when it is not there all the time? It is doubtful that the problem will ever occur when test equipment is hooked up but one you remove the equipment it will act up. These are the facts of life in the auto repair world. Many shops have a policy that they will not work on vehicles that are not exhibiting the problem when brought in. I think this is a disservice to the customer. At the very least some visual checks and a quick couple of tests should be offered. Of course it should be explained to the owner that this is a quick check and may not identify the problem and that there will be a charge and what that cost would be. In today’s high tech world of auto repair many techs forget that a visual inspection and a quick sniff of electrical equipment can reveal numerous problems that can be verified with further tests. Even a slight tap with a hammer can start a motor engage a clutch or break a relay connection loose. Too many shops relay on test equipment to be there magic cure and forget to check the basics first. Many times after testing at length did I clean the battery cables or clean a frame or body ground and repair the problem. When several systems exhibit problems it is usually a ground problem. Many of these grounds along with most connections, in the crowded engine compartment, are difficult to check but remember it is usually the one that is buried that is the problem. The battery in my wife’s car is under the back seat and I have not checked it, always plan to but never get to it. So remember KISS and check the basics before panicking and when in doubt take a break it often helps.