- Nov 29, 2006
- Lake Ridge, Virginia
A friend of mine has a '05 Highlander. She's having trouble now with it periodically not wanting to start. She has heavy corrosion at the battery terminals and went to have it looked at. The mechanic is telling her it might be the alternator causing this. Have any of you ever heard this before? I've been shade-treeing my cars for years and have never heard that an alternator can cause corrosion at the battery terminals. I've always carried a terminal post/connector cleaner brush and wrench so I can clean my terminals as needed. I just can't get to her anytime soon to clean her terminals/connectors They also suggested she replace her battery cables, which I do agree with. They say the corrosion goes deep into the insulated part of the cable.