I purchased this because I bought a 2000 Cherokee with some repairs needed. I wanted to save some money with some DIY repairs. The main repair is that the blower fan does not work. I ordered Haynes b/c chiltons is not available for this vehicle. When I was talking with my mechanic about another car, he said I need to check the relay switch. This book has one paragraph referencing relay switches. Nothing about the specific switch I need to change. I looked up several other issues I wanted to explore and there is nothing. It is all about major repairs or simple service, nothing in between. If it is major, I'd take it to my mechanic and I already know how to change oil and spark plugs. It's the in between that I want to do myself. Live and learn... $23 gone and more to have my mechanic change the relay switch.