I recently bought a 93 Range rover, the wife and I think this is the perfect project car, however after driving it for 3 days, the check engine light came on and after doing some reading on this forum, I looked at the onboard diagnostic reader under the passenger seat. Completely blank. I set the car to position 2, and even tried it with the engine running. so now my question is, How do I check codes if the reader is busted? is there somewhere else I can plug a scanner into?