So my father's battery in his Suburban died, so I figured I would use my 4Runner and jump it. However then when my mother found out, she freaked and said do NOT do that, it can mess up the electronics and computers in the newer vehicles. After some Googling, I have found she is correct. Also I didn't use the proper technique I discovered, I hooked up the positive and negative on the 4Runner, then the negative to the engine block and the positive to the battery in the Suburban. I read though that you should always hook up both positives first. Did I run a serious risk of damaging my vehicle's electronics?